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 friend and I went to a mine. We dug holes everywhere looking for rocks. We found different versions of tourmaline. We collected them in a bag. We brought the rocks home to our collection.
 selected sentence: We found different versions of tourmaline.

My friend and I look for rocks >Causes/Enables> We find tourmaline