TASK DEFINITION: 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.
PROBLEM: Question: Does creatine supplementation affect kidney function in an animal model with pre-existing renal failure?
Answer: Creatine supplementation at a dosage of 2% w/w for 4 weeks does not impair kidney function in animals with pre-existing renal failure or in control animals.

SOLUTION: no

PROBLEM: Question: Does dNA Methylation of MMP9 be Associated with High Levels of MMP-9 Messenger RNA in Periapical Inflammatory Lesions?
Answer: The present study suggests that the unmethylated status of the MMP9 gene in periapical lesions may explain the observed up-regulation of messenger RNA transcription in these lesions.

SOLUTION: yes

PROBLEM: Question: Does effective blue light photodynamic therapy affect cutaneous langerhans cell number or oxidatively damage DNA?
Answer: Customary blue light BASI-ALA-PDT does not affect the LC number or produce oxidative DNA damage, the sequelae of red light PDT responsible for immunosuppression in treated skin.

SOLUTION:
no