instruction:
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.
question:
Question: Is l-arginine , the natural precursor of NO , effective for preventing bone loss in postmenopausal women?
Answer: We conclude from these results that supplementation with L-arginine hydrochloride is not effective for improving bone mass in humans.
answer:
no

question:
Question: Is alloantigen-driven T cell death mediated by Fas ligand and tumor necrosis factor-alpha essential for the induction of allograft acceptance?
Answer: These data indicate that: (1) FasL and TNFalpha expression are not obligatory for the induction of long-term allograft acceptance by CTLA4Ig and (2) FasL- and TNFalpha-independent death pathways contribute to alloantigen-driven T cell apoptosis.
answer:
no

question:
Question: Is anticholinergic burden associated with recurrent and injurious falls in older individuals?
Answer: The association between recurrent and injurious falls and the use of any medications listed in the ACB scale was mediated through gait and balance impairment but not by muscular weakness, providing a novel insight into the potential mechanistic link between ACB and falls. Future studies should determine whether TUG and FR measurements could help inform risk to benefit decisions where ACB medications are being considered.
answer:
yes