id	domain	url
elements-9306	www.reuters.com	http://www.reuters.com/article/us-usa-poll-raceidusbre97704320130808
elements-9306	repository.upenn.edu	http://repository.upenn.edu/cgi
elements-9306	www.huffingtonpost.com	http://www.huffingtonpost.com/juliej-park/self-segregation_b_3785384.html
elements-9306	www.reuters.com	http://www.reuters.com/article/us-usa-poll-race-idusbre97704320130808
elements-9306	www.reuters.com	http://www.reuters.com/article/us-usa-poll-race-idusbre97704320130808
elements-9306	repository.upenn.edu	http://repository.upenn.edu/cgi/viewcontent.cgi?article=1170&context=gse_pubs
elements-9306	repository.upenn.edu	http://repository.upenn.edu/cgi/viewcontent.cgi?article=1170&context=gse_pubs
elements-9306	www.huffingtonpost.com	http://www.huffingtonpost.com/julie-j-park/self-segregation_b_3785384.html
elements-9306	www.huffingtonpost.com	http://www.huffingtonpost.com/julie-j-park/self-segregation_b_3785384.html