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.

[EX Q]: Question: Does the Drosophila Chmp1 protein determine wing cell fate through regulation of epidermal growth factor receptor signaling?
Answer: Drosophila Chmp1 negatively regulates DER signaling, likely through its role in MVB formation. Loss of Chmp1 activity in the Drosophila wing induces a cell fate change from intervein to vein that should provide a useful tool for future studies of ESCRT protein activity.
[EX A]: yes

[EX Q]: Question: Is dorsal plication without degloving safe and effective for correcting ventral penile deformities?
Answer: Penile plication is a safe and effective technique for correcting all directions of curvature. Dorsal plication without degloving produces favorable objective and subjective results comparable to ventral and lateral plication.
[EX A]: yes

[EX Q]: Question: Do botulinum toxin type a injections into the trigone to treat idiopathic overactive bladder induce vesicoureteral reflux?
Answer: Botulinum toxin A injection into the trigone does not induce de novo vesicoureteral reflux in patients with nonneurogenic overactive bladder. The therapeutic value of this approach remains to be confirmed and compared to other injection designs.
[EX A]:
no