URL	Title	Id
http://digfir-published.macmillanusa.com/lodish_animation/a0407_retroviral_lifecycle.html	Chapter 4. Life Cycle of a Retrovirus	519bca41b11c0f136800005c
http://digfir-published.macmillanusa.com/lodish_animation/a0407_retroviral_lifecycle_dlap.xml	DLAP questions	519bca41b11c0f136800005c