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.

Example Input: Question: Do apolipoprotein E genotypes influence the age of onset in Huntington 's disease?
Answer: The ApoE genotype does not affect the course of HD significantly.
Example Output: no

Example Input: Question: Does monocyte chemoattractant protein-1 or macrophage inflammatory protein-1alpha deficiency affect angiotensin II-induced intimal hyperplasia in carotid artery ligation model?
Answer: These results indicate that MCP-1 or MIP-1alpha may not be essential in mediating the proliferative effects of Ang II, a major pathological changes in intimal hyperplasia in the carotid artery ligation model.
Example Output: no

Example Input: Question: Does chronic psychological stress in high-anxiety rats induce sustained bladder hyperalgesia?
Answer: Chronic WAS induces sustained bladder hyperalgesia, lasting over a month after exposure to stress. The urinary frequency demonstrated previously in anxiety-prone rats exposed to chronic WAS seems to be associated with bladder hyperalgesia, suggesting that this is a potential model for future studies of bladder hypersensitivity syndromes such as interstitial cystitis/painful bladder syndrome (IC/PBS).
Example Output:
yes