Custom NER Model Training: Turnkey Solution

[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O] Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O] Prescribed [O] paracetamol [B-DRUG] . [SEP]"}

Wait, the instruction says to restore proper newlines inside a single code block that was flattened. But this is a single line of tokens, not a multi-line structure. It seems like it's a sequence of tokens for NER. Possibly it should be split into sentences? But the instruction says "For ASCII diagrams (arrows ↑↓→← or boxes [ ]): each logical row on its own line." Here we have brackets but they are token labels, not boxes. Actually the tokens are like [B-PER] etc. But the instruction says "Do NOT alter any character other than adding 
 and leading indentation." So we cannot change anything else. The original is one line. Maybe it should be split at sentence boundaries? But there are periods. However, the instruction says "restore proper newlines inside a single code block that was flattened to one line by an upstream LLM." So we need to infer where newlines were originally. Possibly it was originally multiple lines, each line being a sentence or a segment. But we don't have context. The example given is a single line. Perhaps it should be split at each period? But that would add newlines after periods. However, the instruction says "For Python/YAML/JSON/bash/JS/TS: restore idiomatic line breaks (imports, def/class, control blocks, YAML keys, list items)." This is not any of those. It's a sequence of tokens. Maybe it's a CoNLL format? But it's not tab-separated. It's space-separated with tags. Possibly it should be one token per line? But that would be a huge change. The instruction says "Do NOT alter any character other than adding 
 and leading indentation." So we can only add newlines. We cannot split tokens. So we need to decide where to put newlines. Perhaps it's a single sentence, so no newlines needed. But the instruction says "restore proper newlines" implying there were some. Maybe the original had each sentence on a new line? But there is only one sentence here. Actually there are multiple sentences: "Patient Ivanov complains of headache ." "Diagnosis : migraine ." "Prescribed paracetamol ." So we could split at periods. But the periods are tokens with [O] tags. So we can add newlines after each period token? But we need to preserve the tokens. Let's see the string: "[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O] Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O] Prescribed [O] paracetamol [B-DRUG] . [SEP]"

We can split at the periods that are followed by a space and then a token that starts a new sentence? But we cannot remove spaces. We can add newlines. So we could put a newline after each period token? But then we have to consider the tags. Actually the period is a token, and then there is a space and then [O] which is the tag for the period? Wait, the format seems to be token followed by tag? Actually it's like "Patient [B-PER]" meaning token "Patient" has tag B-PER. But then "Ivanov [I-PER]" etc. But then we have "headache [B-SYMPTOM] [I-SYMPTOM]" - that suggests that "headache" has two tags? That doesn't make sense. Actually it might be that the tokens are separated by spaces and each token is followed by its tag in brackets? But then "headache [B-SYMPTOM] [I-SYMPTOM]" would mean headache has two tags? Possibly it's a sequence of token-tag pairs, but sometimes a token can have multiple tags? Or maybe it's a different format. Let's parse: The string starts with "[CLS]" which is a special token. Then "Patient" then "[B-PER]" - so that is token "Patient" with tag B-PER. Then "Ivanov" then "[I-PER]" - token Ivanov with tag I-PER. Then "complains" then "[O]" - token complains with tag O. Then "of" then "[O]" - token of with tag O. Then "headache" then "[B-SYMPTOM]" then "[I-SYMPTOM]" - that would be token headache with two tags? That is odd. Possibly it's a mistake. Maybe it should be "headache [B-SYMPTOM]" and then the next token is something else? But there is no space between [B-SYMPTOM] and [I-SYMPTOM]? Actually there is a space: "headache [B-SYMPTOM] [I-SYMPTOM]" so it's three tokens: "headache", "[B-SYMPTOM]", "[I-SYMPTOM]"? But then the tags are not attached to tokens. Actually in typical NER, we have token and tag separated by space, but here they are interleaved. Possibly it's a sequence of tokens and tags, but each token is followed by its tag, but sometimes a token can have multiple tags? That doesn't make sense. Alternatively, it might be that the tokens are the words and the tags are in brackets, but they are separate tokens. For example, the sequence is: [CLS], Patient, [B-PER], Ivanov, [I-PER], complains, [O], of, [O], headache, [B-SYMPTOM], [I-SYMPTOM], ., [O], Diagnosis, [O], :, [O], migraine, [B-DIAGNOSIS], ., [O], Prescribed, [O], paracetamol, [B-DRUG], ., [SEP]

So it's a sequence of tokens, some are words, some are tags in brackets, some are punctuation. So it's a flat list. The instruction says "For ASCII diagrams (arrows ↑↓→← or boxes [ ]): each logical row on its own line." But here we have brackets but they are not boxes, they are tags. So that doesn't apply. So perhaps we should not add any newlines because it's a single sequence. But the instruction says "restore proper newlines" implying there were some. Maybe the original had each sentence on a new line? But we don't know. Possibly it was originally a multi-line format where each line is a sentence? But we have only one line. Could it be that the original had each token on a new line? That would be a typical CoNLL format, but here tokens are space-separated. So maybe we need to split at sentence boundaries. The periods indicate sentence boundaries. So we can add newlines after each period token? But we have to be careful with the tags. Let's see: after the first period, there is a space and then [O] which is the tag for the period? Actually in the sequence, we have ". [O]" so the period is a token and [O] is its tag? But then we have "Diagnosis [O]" - that would be token Diagnosis with tag O? But then we have ":" and then "[O]" - so colon with tag O? Then "migraine [B-DIAGNOSIS]" - token migraine with tag B-DIAGNOSIS. Then "." and "[O]" - period with tag O. Then "Prescribed [O]" - token Prescribed with tag O. Then "paracetamol [B-DRUG]" - token paracetamol with tag B-DRUG. Then "." and "[SEP]" - period with tag SEP? Actually [SEP] is a special token, not a tag. So it's confusing.

Maybe the format is: each token is followed by its tag, but sometimes a token can have multiple tags? Actually in the string, we see "headache [B-SYMPTOM] [I-SYMPTOM]" - that suggests that the token "headache" has two tags? That is not standard. Possibly it's a mistake and it should be "headache [B-SYMPTOM]" and then the next token is something else? But there is no space between [B-SYMPTOM] and [I-SYMPTOM]? Actually there is a space. So it's three tokens: "headache", "[B-SYMPTOM]", "[I-SYMPTOM]". So the tags are separate tokens. So the sequence is a mix of words and tags. So it's not a token-tag pair format. It's just a sequence of tokens. So perhaps it's a sequence of tokens for a BERT input, where special tokens like [CLS] and [SEP] are included, and the tags are also tokens? That doesn't make sense.

Given the instruction, we are to restore newlines. Since it's a single line, maybe we should not add any newlines. But the instruction says "restore proper newlines" implying there were some. Perhaps the original had each sentence on a new line. So we can split at the periods that are followed by a space and then a capital letter? But we cannot remove spaces. We can add newlines after the period token and its tag? Actually we need to decide where to put newlines. Let's look at the structure: There are three sentences: "Patient Ivanov complains of headache ." "Diagnosis : migraine ." "Prescribed paracetamol ." So we can put newlines after the period token and its associated tag? But the period token is followed by a space and then [O] which is its tag? Actually in the sequence, we have ". [O]" so the period is a token and [O] is another token. So we could put a newline after the [O] that follows the period? But then we have "Diagnosis" which starts a new sentence. So we can put a newline before "Diagnosis" and before "Prescribed". But we need to preserve the tokens. So we can add newlines at those points.

Let's identify the sentence boundaries. The periods are tokens. After each period, there is a space and then a tag token [O] or [SEP]. So we can put a newline after the tag that follows the period? But we have to be careful: the first period is followed by [O], then space, then "Diagnosis". So we can put a newline after [O]? But then we have "Diagnosis" on a new line. Similarly, the second period is followed by [O], then space, then "Prescribed". So we can put a newline after that [O]. The third period is followed by [SEP] which is the end. So we can put a newline after [SEP]? But that would be the end.

But we also have the beginning [CLS] and then "Patient". So we can put a newline after [CLS]? Possibly not.

Maybe the original had each sentence on a separate line, with the [CLS] at the beginning of the first line and [SEP] at the end of the last line. So we can split into three lines:

Line 1: [CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]
Line 2: Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]
Line 3: Prescribed [O] paracetamol [B-DRUG] . [SEP]

But note that in line 1, we have "headache [B-SYMPTOM] [I-SYMPTOM]" - that is three tokens. That might be correct. So we can add newlines after the [O] that follows the first period, and after the [O] that follows the second period. But we need to ensure we don't break any token pairs. Since the tokens are space-separated, we can just insert newlines at those points.

Let's write the original string with spaces:

"[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O] Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O] Prescribed [O] paracetamol [B-DRUG] . [SEP]"

We want to add newlines after the first "[O]" that follows the first period? Actually the first period is followed by "[O]" then space then "Diagnosis". So we can put a newline after that "[O]". Similarly, the second period is followed by "[O]" then space then "Prescribed". So we can put a newline after that "[O]". And the third period is followed by "[SEP]" so we can put a newline after "[SEP]" but that would be the end.

So the reformatted code would be:

[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]
Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]
Prescribed [O] paracetamol [B-DRUG] . [SEP]

But we need to ensure that we don't have extra spaces at the beginning of lines. The original has no leading spaces. So we just add newlines.

But the instruction says "Do NOT alter any character other than adding 
 and leading indentation." So we can add newlines. We cannot remove spaces. So we just insert newline characters at those positions.

So the output JSON should have the code with real newlines.

Let's construct the string with newlines. We'll use 
 to represent newline.

So the code is:

"[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]
Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]
Prescribed [O] paracetamol [B-DRUG] . [SEP]"

But we need to check if there is any leading indentation required. The instruction says "Preserve indentation (4 spaces for Python, 2 spaces for YAML)." But this is not Python or YAML. So no indentation needed. So we just have the lines as above.

But wait, the instruction says "For ASCII diagrams (arrows ↑↓→← or boxes [ ]): each logical row on its own line." Here we have brackets but they are not boxes, they are tags. So that doesn't apply.

So I think this is the correct reformatting.

But let's double-check: The original had no newlines. We added newlines after the first [O] that follows the first period, and after the second [O] that follows the second period. But we need to ensure that we don't break the sequence incorrectly. For example, after the first period, we have ". [O]" so the period and [O] are on the same line. Then we put a newline after [O], so the next token "Diagnosis" starts a new line. That seems fine.

Similarly, after the second period, we have ". [O]" then newline then "Prescribed". That is fine.

The third period is followed by "[SEP]" so we put a newline after [SEP]? Actually we don't need to put a newline at the end because it's the end of the string. But we can put a newline after [SEP] if we want, but it's not necessary. The instruction says "restore proper newlines" so we should put newlines where they were originally. Since we don't know, we can assume each sentence is on its own line. So we have three lines. The last line ends with [SEP] and no newline after it? Typically we might have a newline at the end, but it's not required. We'll just have the three lines without a trailing newline.

So the code string is as above.

Now we need to output JSON with {"code": "..."} where the code contains real newlines. In JSON, we need to escape newlines as 
. So we'll write the string with 
.

Thus the output is:

{"code": "[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]
Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]
Prescribed [O] paracetamol [B-DRUG] . [SEP]"}

But we need to ensure that we don't have any extra spaces. The original had spaces between tokens. We preserved them.

Let's verify the original string: "[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O] Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O] Prescribed [O] paracetamol [B-DRUG] . [SEP]"

We split after the first "[O]" that follows the first period. That is after the token "[O]" that comes after the period. So we have:

Line1: "[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]"

Then newline.

Line2: "Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]"

Then newline.

Line3: "Prescribed [O] paracetamol [B-DRUG] . [SEP]"

Yes.

So that is the answer.

But wait, the instruction says "For ASCII diagrams (arrows ↑↓→← or boxes [ ]): each logical row on its own line." Here we have brackets but they are not boxes, they are tags. So that doesn't apply.

So I'll output that.

But let's consider if there is any other interpretation. Maybe the original had each token on a new line? That would be a typical NER format. But then we would have many lines. However, the instruction says "restore proper newlines" and we don't know the original. Given that it's a single line, it's likely that it was originally multiple lines with each sentence on a line. So I'll go with that.

Thus the final JSON.<｜end▁of▁thinking｜>{"code": "[CLS] Patient [B-PER] Ivanov [I-PER] complains [O] of [O] headache [B-SYMPTOM] [I-SYMPTOM] . [O]
Diagnosis [O] : [O] migraine [B-DIAGNOSIS] . [O]
Prescribed [O] paracetamol [B-DRUG] . [SEP]