URL	Title	Id
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_the_magnetic_fields_of_five_planets.html	Chapter 1. The Magnetic Fields of Five Planets	513ab21eb11c0f605b00000c
http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_the_magnetic_fields_of_five_planets_dlap.xml	DLAP questions	513ab21eb11c0f605b00000c