Sentence 1: Gary was walking his dog on the sidewalk. 
 Sentence 3: It ran towards a crowded street with a traffic 
 Sentence 4:  A man hit the dog on the side while he was driving 
 Sentence 5:  Since he only felt a small thud, he didn't bother to stop 
 Given Sentence 2: She was visiting from NH and was at Union Station.