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 ribbon-associated protein C-terminal-binding protein 1 essential for the structure and function of retinal ribbon synapses?
Answer: Overall the results suggest that CtBP1 protein is not essential for the formation of functional ribbon synapses in the retina.

Ex Output:
no


Ex Input:
Question: Does treatment of subclinical hypothyroidism affect bone mass as determined by dual-energy X-ray absorptiometry , peripheral quantitative computed tomography and quantitative bone ultrasound in Spanish women?
Answer: Our results indicate that adequate metabolic control through replacement treatment with L-T4 in pre- and postmenopausal women does not affect bone mass.

Ex Output:
no


Ex Input:
Question: Are serum lactates predictive of heart failure severity in status I cardiac transplant candidates?
Answer: Blood lactate remains unaffected by worsening congestive heart failure of cardiomyopathy patients and is not predictive of heart failure severity in status I cardiac transplant candidates.

Ex Output:

no