Sentence 1: Anna owns a puppy named Wilfred. 
 Sentence 3: Anna asked her neighbor to keep her dog tied up 
 Sentence 4:  Anna's neighbor refused to keep the dog on a leash 
 Sentence 5:  Anna and her neighbor are no longer speaking to each other 
 Option 1: Anna's boyfriend's dog attacked Wilfred. 
 Option 2: Anna's neighbor's dog attacked Wilfred.