Sentence 1: Mario grew Christmas trees in his yard instead of buying them. 
 Sentence 3: Mario felt bad for the bird and spared the tree 
 Sentence 4:  He then went out to buy a fake tree instead 
 Sentence 5:  He is much happier with his choice now 
 Given Sentence 2: This year he found a bird in one of his trees as he was cutting it.