URL	Title	Id
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_some_properties_of_galaxies.html	Chapter 1. Some Properties of Galaxies	51413917b11c0f181b000000
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_some_properties_of_galaxies_dlap.xml	DLAP questions	51413917b11c0f181b000000