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.

Input: Consider Input: Question: Is cerebral acetylcholinesterase activity decreased in MS patients with cognitive impairment?
Answer: In the patient group regional AChE activities had inverse correlations with Word learning and MMSE (Mini-Mental State Examination) scores. In the group of cognitively deteriorated MS patients no change in cerebral AChE activity, compared with controls, was observed, but within the patient group more pronounced cognitive symptoms were associated with higher cerebral AChE activity.

Output: no

Input: Consider Input: Question: Is central venous saturation an alternative to mixed venous saturation during cardiopulmonary bypass in coronary artery surgery patients?
Answer: Although mean biases between the measurements were low, limits of agreement were too large to provide a clinically acceptable estimation of SvO(2) by ScvO(2) in these conditions. Variations in regional oxygen consumption seem to be the main factor worsening the relationship.

Output: no

Input: Consider Input: Question: Does the fibrinogen A/ ' isoform promote acute arterial thrombosis in mice?
Answer: Both A/A and A/' fibrinogen were cleaved by murine and human thrombin and were incorporated into murine and human clots. When A/A or A/' was spiked into plasma, A/A increased the fibrin formation rate to a greater extent than A/'. In mice, compared to controls, A/A infusion shortened the time to carotid artery occlusion, whereas A/' infusion did not. Additionally, A/' infusion led to lower levels of plasma thrombin-antithrombin complexes following arterial injury, whereas A/A infusion did not. These data suggest that A/' binds thrombin in vivo and decreases prothrombotic activity. Together, these findings indicate that elevated levels of A/A fibrinogen promote arterial thrombosis in vivo, whereas A/' does not.
Output: no