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: Justin built a big snow fort last week. The fort was over four feet tall. Justin would use it to hide in during snowball fights. The sun came out and the weather warmed up. The snow fort melted and is just a pile of snow now.
 selected sentence: The fort was over four feet tall.

Justin built a fort >Causes/Enables> The fort is four feet tall