… . . . . . . . . . . . 152 Recall-Oriented Learning of Named Entities in Arabic Wikipedia Behrang Mohit, Nathan Schneider, Rishav Bhowmick, Kemal Oflazer and Noah A. Smith . . . . 162 ix Tree Representations in Probabilistic Models for Extended Named Entities Detection Marco Dina…

…mmunication and collaboration tools and environments like forums, chats, blogs, wikis etc. However, no system is really providing complex analysis and feedback facilities on chat and forum discussions in order to be useful for learners and 22 tutors. There are at least two factor…