It has long been pointed out that the one-topic-per-message assumption (each message contains only one topic) helps topic models alleviate the data sparsity issue in short texts on microblogs (Zhao et al., 2011;Quan et al., 2015;Nguyen et al., 2015;Li et al., 2018).
we observe contradictory results because both LF-DMM and Li et al.