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: Bobby was excited for the weekend. His father had promised to take him to the zoo. Unfortunately it started raining Saturday morning. Bobby's father took him to the zoo anyways. Bobby got to see the baby elephant splash in the rain puddles.
 selected sentence: Bobby was excited for the weekend.

Bobby's father promises to take him to the zoo >Causes/Enables> Bobby is excited