OAQA Biomedical Question Answering (BioASQ) System

This system uses the ECD/CSE framework (an extension to the Apache UIMA framework which support formal, declarative YAML-based descriptors for the space of system and component configurations to be explored during system optimization), BaseQA type system as well as various natural language processing and information retrieval algorithms and tools.
https://github.com/oaqa/bioasq

Document, concept, and snippet retrieval

Exact answer generation for factoid and list questions

Answer prediction for yes/no questions