“…Causal Semantic Detection: Recently, causality detection which detects specific causes and effects and the relations between them has received more attention, such as the researches proposed by Li (Li and Mao, 2019), Zhang (Zhang et al, 2017), Bekoulis (Bekoulis et al, 2018), Do (Do et al, 2011, Riaz (Riaz and Girju, 2014), Dunietz (Dunietz et al, 2017a) and Sharp (Sharp et al, 2016). Specifically, to extract the causal explanation semantics from the messages in a general level, some researches capture the causal semantics in messages from the perspective of discourse structure, such as capturing counterfactual conditionals from a social message with the PDTB discourse relation parsing (Son et al, 2017), a pre-trained model with Rhetorical Structure Theory Discourse Treebank (RSTDT) for exploiting discourse structures on movie reviews (Ji and Smith, 2017), and a two-step interactive hierarchical Bi-LSTM framework (Xia and Ding, 2019) to extract emotion-cause pair in messages. Furthermore, Son (2018) defines the causal explanation analysis task (CEA) to extract causal explanatory semantics in messages and annotates a dataset for other downstream tasks.…”