Cost-Sensitive Learning in Answer Extraction Michael Wiegand author Jochen L Leidner author Dietrich Klakow author 2008-05 text Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC’08) Nicoletta Calzolari editor Khalid Choukri editor Bente Maegaard editor Joseph Mariani editor Jan Odijk editor Stelios Piperidis editor Daniel Tapias editor European Language Resources Association (ELRA) Marrakech, Morocco conference publication wiegand-etal-2008-cost https://aclanthology.org/L08-1293/ 2008-05