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: Sam was tired after watching a movie. He almost fell asleep on the sofa. Eventually he made it to his bed. He woke up when he thought it was morning. He had just forgotten to turn off the lights, though.
 selected sentence: He had just forgotten to turn off the lights, though.

Sam stays up late >Causes/Enables> Sam forgets to turn off the lights