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: Do changes in basophil activation during grass-pollen sublingual immunotherapy correlate with clinical efficacy?
Answer: Allergen reactivity of peripheral blood basophils is not a biomarker for adverse events or early onset of clinical responses to SLIT.
[EX A]: no

[EX Q]: Question: Does in a safety net population HPV4 vaccine adherence worsen as BMI increases?
Answer: Obesity, as well as gravidity and Hispanic race, are risk factors for lack of HPV4 vaccine adherence among young females in a safety net population.
[EX A]: yes

[EX Q]: Question: Do continence alterations after ileal pouch-anal anastomosis diminish quality of life?
Answer: Although continence is clearly altered after pelvic pouch surgery, quality of life is extremely well preserved.
[EX A]:
no