id	domain	url
catalyst-28821	www.nature.com	http://www.nature.com/news/sex-redefined-1.16943
catalyst-28821	www.bwhi.org	http://www.bwhi.org/issues/breast-cancer/breast-cancer
catalyst-28821	www.cia.gov	https://www.cia.gov/library/publications/the-world-factbook/rankorder/2102rank.html
catalyst-28821	www.biomedcentral.com	http://www.biomedcentral.com/content/pdf/2042-6410-3-27.pdf
catalyst-28821	www.cdc.gov	http://www.cdc.gov/nchs/data/nvsr/nvsr63/nvsr63_01.pdf
catalyst-28821	genderedinnovations.stanford.edu	http://genderedinnovations.stanford.edu/methods/sex.html
catalyst-28821	thecolbertreport.cc.com	http://thecolbertreport.cc.com/videos/el90zp/co-ed-lab-rats