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: Do time and tumor type ( primary or metastatic ) influence the detection of BRAF/NRAS mutations in formalin fixed paraffin embedded samples from melanomas?
Answer: Preserving sufficient tumor area in FFPE blocks is important. It is necessary to keep the FFPE blocks, no matter their age, as they are necessary to decide the best treatment for the melanoma patient.
Output:
no