Detailed Instructions: 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: Cam called his friend Joe to find out where Joe was. Joe explained that he was at the diner and invited Cam. Cam drove to the nearest diner and looked for Joe. Joe was nowhere to be seen. Cam called Joe and Joe said he was at a different diner.
Why did Cam call Joe and Joe?
A:
Joe explained that he was at the diner and invited Cam.