Sentence 1: Molly and her family have a house in tornado alley. 
 Sentence 3: They went to their safe space and bunkered down 
 Sentence 4:  They waited and waited 
 Sentence 5:  The tornado hit and part of the roof was taken off the house 
 Option 1: They were getting ready to leave for work when they heard the siren. 
 Option 2: Their safe space was being remodeled and had no roof.