Sentence 1: Five men were working in a rock quarry. 
 Sentence 3: The men ran when they saw that the tower was going to fall on them 
 Sentence 4:  They got in their trucks and sped out of the quarry 
 Sentence 5:  Safely above the quarry, the men stopped and watched the water spill 
 Given Sentence 2: He placed an ad in the paper.