You will be given a definition of a task first, then some input of the task.
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.

Question: Do young colorectal carcinoma patients have a poorer prognosis : a comparative review of 2,426 cases?
Answer: Although presenting with advanced tumors and with poorer prognostic factors such as presence of mucin and poor histological differentiation, young CRC patients do not have a worse prognosis.
Output:
no