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 progression rates and sample size estimate for PPMS based on the CLIMB study population?
Answer: Our modern PPMS cohort is demographically similar to previously studied cohorts. PPMS is associated with faster disability accrual than ROMS. Current real-world observations of time to sustained progression will inform design of new clinical trials for PPMS.
[EX A]: yes

[EX Q]: Question: Is epidural analgesia superior to local infiltration analgesia in children with cerebral palsy undergoing unilateral hip reconstruction?
Answer: Epidural analgesia is superior to local infiltration analgesia for early postoperative pain management in children with cerebral palsy who undergo unilateral hip reconstruction.
[EX A]: yes

[EX Q]: Question: Is deficiency of erythropoietin responsible for the anaemia associated with cyclosporin treatment of insulin-dependent diabetes mellitus . Canadian-European Randomized Control Trial Group?
Answer: The light anaemia associated with Cs therapy in IDDM patients is not related to an insufficient production of EPO, but is caused by other, as yet unknown mechanisms, unrelated to the nephrotoxic action of this drug.
[EX A]:
no