[reorg] Move NER script out of bert folder

[eric-haibin-lin]

Description

#1081
Add a "sequence labeling" section in model zoo, with a BERT NER example.

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented

Changes

• Feature1, tests, (and when applicable, API doc)
• Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

[codecov]

Codecov Report

Merging #1090 into master will increase coverage by 9.85%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1090      +/-   ##
==========================================
+ Coverage   78.51%   88.37%   +9.85%     
==========================================
  Files          67       66       -1     
  Lines        6266     6290      +24     
==========================================
+ Hits         4920     5559     +639     
+ Misses       1346      731     -615

Impacted Files	Coverage Δ
src/gluonnlp/model/block.py	53.19% <100%> (ø)	⬆️
src/gluonnlp/optimizer/bert_adam.py	87.32% <0%> (-5.86%)	⬇️
src/gluonnlp/utils/files.py	45.9% <0%> (-3.12%)	⬇️
src/gluonnlp/optimizer/__init__.py	100% <0%> (ø)	⬆️
src/gluonnlp/utils/version.py	100% <0%> (ø)	⬆️
src/gluonnlp/optimizer/lamb.py
src/gluonnlp/model/sampled_block.py	90.74% <0%> (+0.08%)	⬆️
src/gluonnlp/data/glue.py	98.63% <0%> (+1.81%)	⬆️
src/gluonnlp/model/train/embedding.py	87.17% <0%> (+2.56%)	⬆️
src/gluonnlp/embedding/token_embedding.py	91.79% <0%> (+2.82%)	⬆️
... and 19 more

[mli]

Job PR-1090/3 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/3/index.html

[leezu]

Should a test running the finetune_ner / predict_ner scripts be added?

[eric-haibin-lin]

The problem is that we cannot distribute the dataset, so no test was added when it was first merged. But i did test manually with the CoNLL dataset for 1 epoch and it can run successfully.

[leezu]

How about using a small Toy dataset of equivalent format?

[leezu]

My concern is that it's easy to break the script if it's not run at all.

[mli]

Job PR-1090/4 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/4/index.html

[mli]

Job PR-1090/5 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/5/index.html

[mli]

Job PR-1090/6 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/6/index.html

[mli]

Job PR-1090/7 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/7/index.html

[mli]

Job PR-1090/8 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/8/index.html

[mli]

Job PR-1090/9 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/9/index.html

[mli]

Job PR-1090/10 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/10/index.html

[leezu]

LGTM, but you may still want to add a link in docs/model_zoo.rst so that Sequence Labeling task is also highlighted on the front page (and not only as a small item in the left menu)

[mli]

Job PR-1090/11 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-1090/11/index.html

[eric-haibin-lin]

@leezu added to model_zoo.rst