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.

Example Input: Question: Does portal venous stasis during liver resection affect platelet aggregability?
Answer: Induced platelet aggregability is not affected by the method of surgical bleeding control used in liver resection. Platelet aggregability seems to be resistant even to portal venous stasis of up to 50 min during Pringle manoeuvre.
Example Output: no

Example Input: Question: Is plasminogen activation by fibroblasts from periodontal ligament and gingiva directly affected by chemokines in vitro?
Answer: These results suggest that plasminogen activation by PDL and GF is not directly affected by the chemokines even in the presence of the inflammatory mediators TGF-beta and IL-1.
Example Output: no

Example Input: Question: Is pTEN loss associated with a poor response to trastuzumab in HER2-overexpressing gastroesophageal adenocarcinoma?
Answer: PTEN loss was frequently found in HER2-overexpressing tumors, and was associated with a poor response to trastuzumab-based therapy in patients with GEA.
Example Output:
yes