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 eating a sandwich. The doorbell rang. Sam put the sandwich down. Sam's dog jumped at the sandwich. When Sam returned, the sandwich was gone.
 selected sentence: Sam's dog jumped at the sandwich.

Sam leaves his sandwich to go to the door >Causes/Enables> Sam's dog jumps at the sandwich