In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Q: Title: Teaching Boys. Sentence 1: Anna was a single mom to a teenage boy, Joe, and it was hard. Sentence 2: He had no uncles or male role models in his life-so Anna got an idea. Sentence 3: She signed Joe up as a Big Brother at the YWCA, helping younger boys. Sentence 4: It seemed counterintuitive, but Joe matured a lot in the program.
A:
Mentoring forced him to become his own man-and his own role model.