Sentence 1: Jill knew she left her math homework on the table. 
 Sentence 3: She looked all over for it 
 Sentence 4:  Then she saw her black Lab Izzy with some papers in her mouth 
 Sentence 5:  It was Jill's math homework 
 Given Sentence 2: However, when she went to put it in her backpack it wasn't there.