URL	Title	Id
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_the_geometry_of_the_universe.html	Chapter 1. The Geometry of the Universe	51413996b11c0f181b00000f
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_the_geometry_of_the_universe_dlap.xml	DLAP questions	51413996b11c0f181b00000f