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: Today I took a train to meet my friends. The train was very loud and made it hard to sleep. I tried to take some sleeping pills to help me sleep. I fell asleep so hard that I missed my stop. I called my friends and bought a new ticket to meet up with them.
 selected sentence: The train was very loud and made it hard to sleep.

I took a train to visit my friends >Causes/Enables> I couldn't sleep because of the noise