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 obesity independently influence gonadal function in very long-term adult male survivors of childhood cancer?
Answer: Obesity is associated with gonadal dysfunction in male CCS, independent of the irreversible effect of previous cancer treatment. Randomized controlled trials are required to evaluate whether weight normalization could improve gonadal function, especially in obese survivors with potential other mechanisms than lifestyle causing their obesity.
[EX A]: yes

[EX Q]: Question: Are cXXC4 mRNA levels associated with clinicopathological parameters and survival of myelodysplastic syndrome patients?
Answer: This study demonstrated that the age of patients and levels of CXXC4 mRNA, hemoglobin, and marrow blast associated with survival of MDS patients.
[EX A]: yes

[EX Q]: Question: Does ketamine reduce postoperative morphine consumption after tonsillectomy in children?
Answer: The addition of ketamine 0.25 mg/kg at induction of anesthesia did not decrease postoperative morphine consumption in children undergoing tonsillectomy.
[EX A]:
no