Delete legacy JSON metadata (#4)

Add language tag (#3)

Update README.md (#2)

Reorder split names (#1)

add dataset_info in dataset metadata

remove dummmy data

Update files from the datasets library (from 1.16.0)

Update files from the datasets library (from 1.12.0)

Update files from the datasets library (from 1.7.0)

Update files from the datasets library (from 1.6.0)

Update files from the datasets library (from 1.4.0)

Update files from the datasets library (from 1.3.0)

Update files from the datasets library (from 1.0.0)