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: Does preoperative chemoradiotherapy compromise the feasibility of adjuvant chemotherapy for patients with pancreatic ductal adenocarcinoma?
Answer: Preoperative CRT was demonstrated to be safe and did not compromise the feasibility of adjuvant chemotherapy.
no