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: Is increased expression of hyaluronic acid binding protein 1 correlated with poor prognosis in patients with breast cancer?
Answer: HABP1 might be an independent predictive factor for breast cancer prognosis and up-regulation of HABP1 might play an important role in the metastasis of breast cancer.
Example Output: yes

Example Input: Question: Does active Maintenance of the Gradient of Refractive Index be Required to Sustain the Optical Properties of the Lens?
Answer: The cellular physiology of the lens actively maintains its optical properties and inhibiting the Na/K/ATPase induces a myopic shift in vision similar to that observed clinically in patients who go on to develop cataract.
Example Output:
yes