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 the usage of overtube have a favorable effect on endoscopic submucosal dissection?
Answer: We conclude that using an overtube during an upper gastrointestinal ESD decreases the need for suction, favors the speed of dissection, and eases the comfort of the procedure.

SOLUTION: yes

PROBLEM: Question: Does nitric acid passivation affect in vitro biocompatibility of titanium?
Answer: Although the protocol for passivation used here could interfere with the pattern of ions released from Ti-6Al-4V and cpTi surfaces, the present study did not show any effect of this surface treatment on in vitro biocompatibility of Ti as evaluated by osteoblast attachment, proliferation, and differentiation.

SOLUTION: no

PROBLEM: Question: Are hypertension and hepatitis C virus infection strong risk factors for developing late renal dysfunction after living donor liver transplantation : significance of renal biopsy?
Answer: Although HCV and hypertension were determined to be independent risk factors for LRD after LDLT, a renal biopsy should be performed when clinical symptoms develop regardless of creatinine levels to provide appropriate treatment.

SOLUTION:
yes