Identification of relations between answers with global constraints for Community-based Question Answering services

Community-based Question Answering services contain many threads consisting of a question and its answers. When there are many answers for a question, it is hard for a user to understand them all. To address this problem, we focus on logical relations between answers in a thread and present a model for identifying the relations between the answers. We consider that there are constraints among the relations, such as a transitive law, and that it might be useful to take these constraints into account. To consider these constraints, we propose the model based on a Markov logic network. We also introduce super-relations to give additional information for logical relation identification into our model. Through the experiment, we show that global constraints and super-relations make it easier to identify the relations.