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: My son needed to brush his teeth. His toothbrush was very dirty. I threw the toothbrush away. I grabbed a new one from the drawer. My son brushed his teeth before bed.
 selected sentence: My son brushed his teeth before bed.

I grabbed new toothbrush from drawer >Causes/Enables> My son brushed his teeth before bed