1. Ferrucci, D., Brown, E., Chu-Carroll, J., Fan, J., Gondek, D., Kalyanpur, A.A., Lally, A., Murdock, J.W., Nyberg, E., Prager, J., Schlaefer, N., Welty, C.: Building Watson: An Overview of the DeepQA Project. AI Magazine 31(3) (2010)
2. Morante, R., Daelemans, W.: Annotating Modality and Negation for a Machine Reading Evaluation. CLEF 2011 Labs and Workshop Notebook Papers (2011)
3. Morante, R., Daelemans, W.: Annotating Modality and Negation for a Machine Reading Evaluation. CLEF 2012 Evaluation Labs and Workshop Online Working Notes (2012)
4. Morante, R., Krallinger, M., Valencia, A., Daelemans, W.: Machine Reading of Biomedical Texts about Alzheimer’s Disease. CLEF 2012 Evaluation Labs and Workshop Online Working Notes (2012)
5. Peñas, A., Rodrigo, Á.: A Simple Measure to Assess Non-response. In: Proceedings of 49th Annual Meeting of the Association for Compu-tational Linguistics-Human Language Technologies (ACL-HLT 2011), Portland, Oregon, USA (2011)