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: Ed had been warned there were jellyfish in the water. He ignored the warnings and went in to swim anyway. He was in the water for a few minutes when he felt a burning pain. He looked down and saw a jellyfish touching his side. He got out of the water as fast as he could.
 selected sentence: Ed had been warned there were jellyfish in the water.

Someone gives Ed a warning >Causes/Enables> Ed is warned