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: Gina's mother wouldn't allow her to keep a stray dog. But she let her keep him in the yard for the night. Gina sat outside and talked to him. The dog stared at her face eagerly. Gina's heart broke to think she had to let him go.
 selected sentence: Gina's heart broke to think she had to let him go.

Gina's mom won't let her keep the dog >Causes/Enables> Gina's heart breaks