Sentence 1: Betty put the trash can out on the curb at night. 
 Sentence 3: Betty couldn't figure out what had happened 
 Sentence 4:  The next night, she saw a raccoon snooping around 
 Sentence 5:  He had knocked over the trash can the night before! 
 Given Sentence 2: The next morning, the can was knocked over and garbage was everywhere.