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: Tim kept messing up at work. His boss told him it was his last warning. Tim messed up again. The boss felt bad. He gave Tim one last last warning.
 selected sentence: His boss told him it was his last warning.

Tim keeps messing up >Causes/Enables> Tim's boss gives Tim a last warning