Sentence 1: Sarah was walking her dog around her neighborhood. 
 Sentence 3: Sarah struggled to restrain her dog on the leash 
 Sentence 4:  Sarah's phone fell out of her pocket in the struggle 
 Sentence 5:  The screen on her phone cracked because of the drop 
 Option 1: Her dog saw a squirrel run up a tree. 
 Option 2: Her dog stopped walking for a few minutes.