Question: What baselines do they compare to?
Answer: LR + Bag-of-words, Tweet2vec, LR + All Features (tweet-level), LR + All Features (chunk-level), FacTweet (tweet-level), Top-$k$ replies, likes, or re-tweets
Alternative answer: Top-$k$ replies, likes, or re-tweets, FacTweet (tweet-level), LR + All Features (chunk-level), LR + All Features (tweet-level), Tweet2vec, LR + Bag-of-words