Definition: 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.
Input: Mary felt weak all of the time. She went to the doctor who ran some tests on her. A week later, the doctor told her that she had cancer. Mary was treated aggressively with the most modern drugs. She made a full recovery.
Why did Mary feel weak all of the time?
Output:
Mary was sick with cancer.