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 implementing goal-directed protocols reduce length of stay after cardiac surgery?
Answer: A milestone-driven pathway supported by team rounding was associated with decreased lengths of CVICU and hospital stay. However, tracking patient trajectories by milestones suggests a more complex relationship than anticipated and presents new opportunities for SREBP implementation and research.
Example Output: yes

Example Input: Question: Does overexpression of long noncoding RNA HOTAIR predict a poor prognosis in patients with cervical cancer?
Answer: our data indicate that high expression of HOTAIR is involved in cervical cancer progression and could be a potential target for diagnosis and gene therapy.
Example Output: yes

Example Input: Question: Is the positive influence of methotrexate on the mortality of patients with rheumatoid arthritis partly independent of its effect on disease activity : results of a re-evaluation 18 years after baseline?
Answer: In this cohort, the mortality lowering effect of continued MTX use was partly independent of its effect on disease activity. This finding may affect treatment decisions concerning RA patients with insufficient response to MTX.
Example Output:
yes