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: John was dating a twin. One day he showed up at her house for a date. Instead of his date, his date's sister showed up at the door. Without realizing it wasn't her, John leaned in to give her a hug. She simply laughed and called over her sister.
 selected sentence: Without realizing it wasn't her, John leaned in to give her a hug.

John thinks the sister is his girlfriend >Causes/Enables> He leans in to give her a hug