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: Is the relationship between insomnia with short sleep duration associated with hypercholesterolemia : a cross-sectional study?
Answer: Insomnia with short sleep duration was associated with increased odds of hypercholesterolemia. Caregivers in clinical practice should watch out for the effect brought by this novel factor.

Ex Output:
yes


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: Is smoking a protective factor for patients with acute myocardial infarction : the viewpoint of the GISSI-2 Study?
Answer: Active smokers presented a lower incidence of reinfarction, stroke and in-hospital mortality rates, but after adjustment for other clinical-epidemiological variables, the apparent protective role of smoking was not confirmed.

Ex Output:

no