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: Megan took her dog to the park. He ran like a wild one after the birds. She had to chase after him. He took off with the leash. He then pulled Megan through the pond at the park.
 selected sentence: She had to chase after him.

The dog runs after birds at the park >Causes/Enables> Megan chases the dog