Instructions: 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: Are angiogenesis and dendritic cell density correlated with metachronous distant metastasis in curatively operated rectal cancer?
Answer: Angiogenesis and dendritic cell density are not prognostic factors for metachronous distant metastasis in rectal cancer and therefore cannot serve as selection parameters for adjuvant therapy.
Output:
no