Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Stewart's dad built a treehouse for him in the back yard. Sentence 2: Stewart and his friends had great fun with the tree house. Sentence 3: Stewart grew older and eventually had a son of his own. Sentence 4: There were no large trees in Stewart's back yard. Sentence 5: Instead of a tree house, Stewart built a fort for his son.

Tree House