@inproceedings {4021,
	title = {WaterlooClarke at the TREC 2019 Conversational Assistant Track},
	booktitle = {Text Retrieval Conference (TREC)},
	year = {2019},
	url = {https://trec.nist.gov/pubs/trec28/papers/WaterlooClarke.C.pdf},
	author = {Charles Clarke}
}
