Mining content from the Web to support human-computer interaction applications (e.g., question answering (Radev et al., 2001;Clarke et al., 2001;Yao et al., 2012), interactive question answering (Wong et al., 2011), conversational systems (Huang et al., 2007;Wu et al., 2008;Shibata et al., 2009)) has been investigated since the advent of the read-write Web.
the practice of mining the Web to alleviate the bottleneck of conversational content acquisition is increasing in popularity.