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: Does interaction of programmed death-1 and programmed death-1 ligand-1 contribute to testicular immune privilege?
Answer: The constitutive expression of PD-L1 in the testis is an important mechanism underlying testicular immune privilege and long-term survival of intratesticular islet allografts.
Example Output: yes

Example Input: Question: Is [ The increase in the speed of the pulse wave associated with elevated central blood pressure in hypertensive patients with kidney disease ]?
Answer: In hypertensive patients with renal disease PWV is increased, but not the AIx. We believe that the AIx is not a reliable measure of arterial stiffness in hypertensive patients with kidney disease.
Example Output: no

Example Input: Question: Are goldmann applanation tonometry and dynamic contour tonometry correlated with central corneal thickness in primary open angle glaucoma?
Answer: In this group of patients with OAG, there was a strong correlation between GAT and DCT measurements of IOP. IOP measured with DCT was consistently higher than IOP measured with GAT. Neither GAT nor DCT measurements were correlated with CCT. This data suggests that factors other than CCT may be involved in the tendency of DCT to produce higher measures of IOP than GAT.
Example Output:
no