We use 16 different datasets from several popular review corpora used in BIBREF20 . These datasets consist of 14 product review datasets and two movie review datasets. We use CoNLL 2000 BIBREF22 sequence labeling dataset for both POS Tagging and Chunking tasks. 
 Question: What dataset did they use?
16 different datasets from several popular review corpora used in BIBREF20 CoNLL 2000 BIBREF22