Sentence 1: Amy got a flat tire one morning. 
 Sentence 3: She had to call for help from the assistance company 
 Sentence 4:  The technician showed up in half an hour and fixed her tire 
 Sentence 5:  Amy thanked him and got back in her car 
 Option 1: She pulled over to change the tire because her dad taught her how. 
 Option 2: She did not know how to change tires.