URL	Title	Id
http://digfir-published.macmillanusa.com/lodish_animation/a0408_retroviral_gene_exp.html	Chapter 4. Retroviral Gene Expression	519bca41b11c0f136800005e
http://digfir-published.macmillanusa.com/lodish_animation/a0408_retroviral_gene_exp_dlap.xml	DLAP questions	519bca41b11c0f136800005e