Definition: 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.
Input: Question: Is overexpression of p53 associated with drug resistance of gastric cancers to 5-fluorouracil-based systemic chemotherapy?
Answer: Our data suggested that the overexpression of p53 does not predict drug resistance to 5-FU of human gastric cancer.
Output:
no