Sentence 1: Jill and Bob have planned their first alone time in years. 
 Sentence 3: When they both notice an awful smell coming from the basement 
 Sentence 4:  When they go to investigate they find that the basement is flooded 
 Sentence 5:  They have to spend all night dealing with a flooded basement 
 Given Sentence 2: His ambulance was called to the scene of a terrible accident.