Position range updated from word level to character level & Added None to [[], []] values in DataLoader

Update README.md

Update CaSSA-catalan-structured-sentiment-analysis.py

Update README.md

Merge branch 'main' of https://huggingface.co/datasets/projecte-aina/CaSSA-catalan-structured-sentiment-analysis

description

Update README.md

Update README.md

url bug

data release

initial commit