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.

Ex Input:
Question: Is tumor differentiation a risk factor for lymph node metastasis in elderly patients with early gastric cancer?
Answer: Elderly patients with undifferentiated type histology early gastric cancer without other risk factors for lymph node metastasis may be candidates for endoscopic resection.

Ex Output:
no


Ex Input:
Question: Is weight-adjusted resting energy expenditure constant in critically ill patients?
Answer: Predictive equations were not able to estimate measured REE adequately in all the patients. Adjusted REE decreased with increasing body mass index; thus, a body mass index group-specific adaptation for the estimation of energy needs should be applied.

Ex Output:
no


Ex Input:
Question: Are inherited variations in AR , ESR1 , and ESR2 genes associated with prostate cancer aggressiveness or with efficacy of androgen deprivation therapy?
Answer: Our results suggest that common genetic variations in AR, ESR1, or ESR2 are not strongly associated with prostate cancer aggressiveness or response to ADT.

Ex Output:

no