[31] Kenton Lee, Ming-Wei Chang, and Kristina Toutanova. Latent retrieval for weakly supervised
open domain question answering. In Proceedings of the 57th Annual Meeting of the Association

12

for Computational Linguistics, pages 6086–6096, Florence, Italy, July 2019. Association for
Computational Linguistics. doi: 10.18653/v1/P19-1612. URL https://www.aclweb.org/
anthology/P19-1612.

[32] Mike Lewis, Yinhan Liu, Naman Goyal, Marjan Ghazvininejad, Abdelrahman Mohamed,
Omer Levy, Veselin Stoyanov, and Luke Zettlemoyer. BART: Denoising sequence-to-sequence
pre-training for natural language generation, translation, and comprehension. arXiv preprint
arXiv:1910.13461, 2019. URL https://arxiv.org/abs/1910.13461.
Retrieval-AugmentedGenerationfor Knowledge-IntensiveNLPTasks