You will be given a definition of a task first, then some input of the task.
Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.

Question: Are potentially traumatic events and serious life stressors prospectively associated with frequency of doctor visits and overnight hospital visits?
Answer: Exposure to potentially traumatic events and serious life stressors is associated with increased doctor visits and nights spent in the hospital, which may have important implications for the current standard of care.
Output:
yes