Wang, S., Yu, M., Guo, X., Wang, Z., Klinger, T., Zhang, W., Chang, S., Tesauro, G., Zhou, B. and Jiang, J. 2018. R³: Reinforced Ranker-Reader for Open-Domain Question Answering. Proceedings of the AAAI Conference on Artificial Intelligence. 32, 1 (Apr. 2018). DOI:https://doi.org/10.1609/aaai.v32i1.12053.