Sentence 1: Sam got a new puppy for his birthday. 
 Sentence 3: Sam walks his puppy everyday 
 Sentence 4:  Sam teaches his puppy tricks and how to catch a frisbee 
 Sentence 5:  Sam loves his new puppy 
 Option 1: He goes to the store to trade it for a kitten. 
 Option 2: He goes to the store to buy supplies.