Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: A little toddler wanted to swing. He pulled his dad to the swing. The son got on the swing. The dad pushed him. The baby was so happy!
 selected sentence: The baby was so happy!

The baby swung on the swing. >Causes/Enables> The baby was so happy.