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: Do an update on long-term outcome of curative hepatic resection for hepatocholangiocarcinoma?
Answer: Hepatocholangiocarcinoma entails poor long-term outcome after potentially curative hepatectomy. Other modalities of treatment should be explored in order to prolong survival of patients with this disease.
[EX A]: yes

[EX Q]: Question: Does severe neutrophil depletion by leucocyte filters or cytotoxic drug improve recovery of contractile function in stunned porcine myocardium?
Answer: As assessed in the pig model of myocardial stunning and using two different methods, severe neutropenia does not reduce the depression of contractile function.
[EX A]:
no