URL	Title	Id
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_conditions_for_eclipses.html	Chapter 1. Conditions for Eclipses	5131fc29b11c0f797a000000
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_conditions_for_eclipses_dlap.xml	DLAP questions	5131fc29b11c0f797a000000