Fix `license` metadata (#1)

Update README.md

Update README.md

Remove local kenlm path

Add perplexity scores

Add dataset deduplication

Rename validation file for dataset loading

Merge branch 'main' of https://huggingface.co/datasets/Finnish-NLP/mc4_fi_cleaned into main

Remove index col

Create README.md

Remove unnecessary dataset columns

Add datasets

initial commit