Markdown (Informal)
[A Graph-based Semi-Supervised Learning for Question-Answering](https://aclanthology.org/P09-1081) (Celikyilmaz et al., ACL-IJCNLP 2009)
ACL
- Asli Celikyilmaz, Marcus Thint, and Zhiheng Huang. 2009. A Graph-based Semi-Supervised Learning for Question-Answering. In Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP, pages 719–727, Suntec, Singapore. Association for Computational Linguistics.