@inproceedings {4105,
	title = {Overview of the TREC 2009 Web Track},
	booktitle = {Text Retrieval Conference (TREC)},
	year = {2009},
	url = {http://trec.nist.gov/pubs/trec18/papers/WEB09.OVERVIEW.pdf},
	author = {Charles Clarke and Nick Craswell and Ian Soboroff}
}
