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 went outside to play with her sisters. But she couldn't find them. She walked around the block and to the store. They were nowhere to be found. Gina sat on the front step waiting for them to return.
 selected sentence: But she couldn't find them.

Gina's sisters are not in any of the places Gina looks >Causes/Enables> Gina can't find her sisters