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: Amy's friend Beth was having a baby. Amy called her friends to come to a surprise baby shower. Everyone waited quietly for Beth to enter. She was shocked when she saw everyone. Beth was so happy since she thought no one cared to give her a shower.
 selected sentence: Amy's friend Beth was having a baby.

Beth gets pregnant >Causes/Enables> Beth is having a baby