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.

Ex Input:
Question: Does preinjury beta blocker usage affect the heart rate response to initial trauma resuscitation?
Answer: Preinjury beta blockade is associated with a slower presenting heart rate, more bradycardia, less tachycardia, but no difference in mortality or ability to achieve a normal heart rate with resuscitation.

Ex Output:
no


Ex Input:
Question: Does three-dimensional assessment of ultrasound features in women with clomiphene citrate-resistant polycystic ovarian syndrome ( PCOS ) : ovarian stromal volume correlate with biochemical indices?
Answer: These findings demonstrate an association of the total ovarian volume, pre-antral follicle number and total follicular volume with some of the biochemical indices of PCOS, but no association was observed between ovarian stromal volume and these indices.

Ex Output:
no


Ex Input:
Question: Do admission serum lactate levels predict mortality in the acutely injured patient?
Answer: This large retrospective examination of admission lactate levels failed to show useful predictive accuracy for hospital death. Serum lactate levels need not be obtained routinely but can be reserved for patients who will be admitted to the intensive care unit and/or require an emergency operation.

Ex Output:

no