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: Mitsy decided to celebrate her birthday by throwing a party. All her closest best friends were invited and they all attended. Mitsy's mom bought her an expensive cupcake to serve as the cake. They sang happy birthday and Mitsy felt great, but she was hungry. Her cupcake had been stolen with no one to confess, Mitsy was crushed.
 selected sentence: Mitsy decided to celebrate her birthday by throwing a party.

Mitsy's birthday is coming up >Causes/Enables> Mitsy throws a birthday party