Thanks for sending a pull request! Please make sure you click the link above to view the contribution guidelines, then fill out the blanks below.

Description

(Brief description on what this PR is about)

Refactor tokenizer Basic Tokenizer and Pretrained Tokenizer
Refactor model structures following huggingface styles for Elmo, BERT, DisenQNet and QuesNet
Add PreprocessingPipeline and Pipeline
Add downstream task: knowledge prediction and property prediction
Fix a bug in RNN which causes ELMo not converging
Move all the test models to modelhub
Update test data files

[ ] [DATASET] Add a new dataset
[x] [BUGFIX] Bugfix
[x] [FEATURE] New feature (non-breaking change which adds functionality)
[ ] [BREAKING] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] [STYLE] Code style update (formatting, renaming)
[x] [REFACTOR] Refactoring (no functional changes, no api changes)
[ ] [BUILD] Build related changes
[ ] [DOC] Documentation content changes
[ ] [OTHER] Other (please describe):

Refactor tokenizer Basic Tokenizer and Pretrained Tokenizer
Refactor model structures following huggingface styles for Elmo, BERT, DisenQNet and QuesNet
Add PreprocessingPipeline and Pipeline
Add downstream task: knowledge prediction and property prediction
Fix a bug in RNN which causes ELMo not converging
Move all the test models to modelhub
Update test data files

127

N/A

Before you submit a pull request, please make sure you have to following:

[x] PR's title starts with a category (e.g. [BUGFIX], [FEATURE], [BREAKING], [DOC], etc)
[x] Changes are complete (i.e. I finished coding on this PR)
[x] All changes have test coverage and al tests passing
[x] Code is well-documented (extended the README / documentation, if necessary)
[x] If this PR is your first one, add your name and github account to AUTHORS.md