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.

[Q]: Question: Is assessment of joint space narrowing with conventional standing antero-posterior radiographs : relief in mild-to-moderate pain a confounder in recent osteoarthritis structure-modifying drug trials?
Answer: Knee pain relief did not bias the report of a structure-modifying effect of glucosamine sulfate in two recent long-term trials, possibly due to the mild-to-moderate patient characteristics. Consensus deliverables should acknowledge that the potential limitations of conventional standing antero-posterior radiographs should not be overestimated since they may not apply to all patient populations and to all studies using this gold standard technique.
[A]: no

[Q]: Question: Is allocentric but not egocentric orientation impaired during normal aging : an ERP study?
Answer: These results suggest that elderly individuals present with deficits when spatial orientation relies on allocentric representation, and are associated with age-related deficits in spatial attention.
[A]: yes

[Q]: Question: Does imiquimod affect shedding of viable chlamydiae in a murine model of Chlamydia trachomatis genital tract infection?
Answer: Imiquimod has no efficacy in controlling C. trachomatis (MoPn) infection in the murine model.
[A]:
no