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: Does pharmacological preconditioning using intraportal infusion of L-arginine protect against hepatic ischemia reperfusion injury?
Answer: Pharmacological preconditioning with intraportal L-arginine provided protection against hepatic I/RI in early phases of the reperfusion period. The mechanisms underlying the protective effect may include preservation of the mitochondrial structure and inhibition of caspase-3 activity.
Example Output: yes

Example Input: Question: Does the PediaSat continuous central SvO2 monitoring system reliably indicate state or course of central venous oxygenation?
Answer: In paediatric and adolescent patients undergoing major surgery, the PediaSat system did not reliably reflect SCO-OXcvO2 values and cannot replace repeated invasive ScvO2 assessments in the clinically relevant range of ScvO2.
Example Output:
no