id	domain	url
crln-9170	www.mdrc.org	www.mdrc.org/publication/reading-partners
crln-9170	dp.la	http://dp.la
crln-9170	edr.sagepub.com	http://edr.sagepub.com/content/43/4/171.full.pdf
crln-9170	blog.archive.org	http://blog.archive.org/2014/05/09