Definition: 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: Question: Do serum neuron-specific enolase levels increase after electroconvulsive therapy?
Answer: ECT did not increase serum NSE values, indicating that electroconvulsive therapy does not cause neuronal damage.
Output:
no