Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Question: Does general anesthesia affect the serum complexed and free prostate specific antigen levels?
Answer: Anaesthesia does not affect PSA levels alone. However, hospitalisation decreases total and free PSA levels, although it does not have an affect on free to total PSA ratio.
Student:
no