Document Re-ranking via Wikipedia Articles for Definition/Biography Type Questions Maofu Liu author Fang Fang author Donghong Ji author 2009-12 text Proceedings of the 23rd Pacific Asia Conference on Language, Information and Computation, Volume 2 Olivia Kwong editor City University of Hong Kong Hong Kong conference publication liu-etal-2009-document https://aclanthology.org/Y09-2037/ 2009-12 748 754