In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.
Q: Louie wanted to open a laser tag arena since he was in high school. He got a bunch of his friends together. They all pitched in to build the arena in a warehouse. They worked for months on the project. They finished last summer and now Louie has his dream business!
Why did They finish last summer?
A:
the arena took months to build.