Recent work has begun to model different aspects of these naturally occurring lay arguments, with tasks including stance classification (Somasundaran and Wiebe, 2009; Walker et al., 2012) , argument summarization (Misra et al., 2015) , sarcasm detection (Justo et al., 2014) and classification of propositions and arguments <cite>(Park and Cardie, 2014</cite>; Park et al., 2015; Oraby et al., 2015) .