Conversation Trees: A Grammar Model for Topic Structure in Forums

• DOI: 10.18653/v1/d15-1178
• Publication Date: 2015-12-15T16:53:04Z
• Authors: Annie Louis; Shay B. Cohen
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Online forum discussions proceed differently from face-to-face conversations and any single thread on an online contains posts different subtopics.This work aims to characterize the content of a as conversation tree topics.We present models that jointly perform two tasks: segment into subparts, assign topic each part.Our core idea is definition structure using probabilistic grammars.By leveraging flexibility grammar formalisms, Context-Free Grammars Linear Rewriting Systems, our create desirable structures for threads: segmentation hierarchical, links non-adjacent segments same topic, labels during segmentation.We show outperform number generation baselines.