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 distinct resting-state perfusion patterns underlie psychomotor retardation in unipolar vs. bipolar depression?
Answer: The differences in rCBF and in the localization of the clusters of positive AL/rCBF correlations between BP and UP suggest that different neural impairments may underlie motor symptoms in the two disorders, but finally converge in phenotypically similar manifestations.
Example Output: yes

Example Input: Question: Is low caregiver health literacy associated with higher pediatric emergency department use and nonurgent visits?
Answer: Over half of caregivers presenting with their children to the ED have low health literacy. Low caregiver health literacy is an independent predictor of higher ED use and use of the ED for nonurgent conditions. In children without a chronic illness, low health literate caregivers had more than 3 times greater odds of presenting for a nonurgent condition than those with adequate health literacy.
Example Output: yes

Example Input: Question: Does intra-articular morphine 5 mg after knee arthroscopy produce significant pain relief when administered to patients with moderate to severe pain via an intra-articular catheter?
Answer: IA morphine 5 mg does not produce clinically significant pain relief in patients with moderate or severe pain after knee arthroscopy.
Example Output:
no