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 the presence and extent of endometriosis effect clinical pregnancy and implantation rates in patients undergoing intracytoplasmic sperm injection?
Answer: The presence and extent of endometriosis do not affect implantation and clinical pregnancy rates in patients undergoing ICSI.
Output:
no