%0 Journal Article %T Document-level multi-topic sentiment classification of Email data with BiLSTM and data augmentation %A Liu, Sisi %A Lee, Kyungmi %A Lee, Ickjai %A , %J Knowledge-Based Systems %V 197 %P 105918 %@ 0950-7051 %D 2020-06-01 %I Elsevier BV %~ DeepDyve