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 short-term , high-dose glucocorticoid treatment contribute to reduced bone mineral density in patients with multiple sclerosis?
Answer: Reduced BMD was prevalent in patients with MS. GC treatment appears not to be the primary underlying cause of secondary osteoporosis in MS patients.
[EX A]: no

[EX Q]: Question: Does bacillus anthracis S-layer protein BslA bound to extracellular matrix by interacting with laminin?
Answer: These data demonstrated that laminin is a ligand for BslA.
[EX A]: yes

[EX Q]: Question: Are regular visitors good substitutes for assessment of elderly patient satisfaction with nursing home care and services?
Answer: Visitors were not able to provide information on elderly patients' satisfaction with nursing home. Their assessments were milder than patient assessments. The NHSQ is reliable for use in either population, but patient and visitor assessments should not be merged in satisfaction studies.
[EX A]:
no