A Modified Information Retrieval Approach to Produce Candidates for Question Answering

The document describes a modified information retrieval (MIRA) approach to produce answer candidates for question answering. MIRA uses expected answer types and subclasses determined by a classifier to retrieve text segments. Answer candidates are validated and selected using a logical validation method called MAVE. Evaluation shows MIRA has the highest recall, covering more questions than other methods and returning the most correct answers, though with lower precision. Future work aims to improve temporal expression handling and support list questions.