Task: Question Answering
Input (English): Passage: My son was full of energy Saturday morning , so I called a friend to see if she wanted to meet me at the playground with her four year old . She agreed , so I packed up my little boy , Sam , and we hopped in the car to drive to the local playground . My son got more and more excited the closer we got . I pulled into the lot and parked and saw my friend was already there , sitting on a bench as her son slid down the slide . They ran to the swings and took turns pushing one another . They ran around laughing and smiling for a good two hours . Finally we could see they were winding down , so we called them over for a drink and a snack . They each had a juice box and granola bar and then , refreshed , they ran back to the monkey bars . Question: Who ran to join him? Option1: Parent Option2: Sam.
Output (English): Sam.