Closes #501 : BEAR Dataset

[karthikrangasai]

Closes #501

Checkbox

• [x] Confirm that this PR is linked to the dataset issue.
• [x] Create the dataloader script biodatasets/my_dataset/my_dataset.py (please use only lowercase and underscore for dataset naming).
• [x] Provide values for the _CITATION, _DATASETNAME, _DESCRIPTION, _HOMEPAGE, _LICENSE, _URLs, _SUPPORTED_TASKS, _SOURCE_VERSION, and _BIGBIO_VERSION variables.
• [x] Implement _info(), _split_generators() and _generate_examples() in dataloader script.
• [x] Make sure that the BUILDER_CONFIGS class attribute is a list with at least one BigBioConfig for the source schema and one for a bigbio schema.
• [x] Confirm dataloader script works with datasets.load_dataset function.
• [x] Confirm that your dataloader script passes the test suite run with python -m tests.test_bigbio biodatasets/my_dataset/my_dataset.py.
• [ ] If my dataset is local, I have provided an output of the unit-tests in the PR (please copy paste). This is OPTIONAL for public datasets, as we can test these without access to the data files.

[hakunanatasha]

@karthikrangasai this looks good but I notice some of the relations are missing in the training data - is this a facet of the dataset (hence why the unit-tests may fail?)

[karthikrangasai]

Hello @hakunanatasha ,

When I ran the tests locally, all of them passed. Let me check once again though to verify.

[karthikrangasai]

Hello @hakunanatasha ,

I ran the tests again and removed some unwanted lines of code. All the tests pass.

[karthikrangasai]

@hakunanatasha , could you please review the changes to the PR