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: Tom went to school one day. He ended up being late for class. The classroom door was locked. The teacher had locked it. She doesn't accept late students.
 selected sentence: The classroom door was locked.

The teacher locked the classroom door >Causes/Enables> The classroom door was locked