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 Input:
Question: Does carriage of the methylenetetrahydrofolate reductase ( MTHFR ) C677T polymorphism influence the first and second trimester uterine artery Doppler flow?
Answer: In summary, the data presented in this adequately powered, prospective, controlled study establish that the MTHFR C677T polymorphism does not influence Doppler flow measurements.

Ex Output:
no


Ex Input:
Question: Does novel Manganese-Porphyrin Superoxide Dismutase-Mimetic widen the Therapeutic Margin in a Preclinical Head and Neck Cancer Model?
Answer: MnBuOE widens the therapeutic margin by decreasing the dose of radiation required to control tumor, while increasing normal tissue resistance to RT-mediated injury. This is the first study to quantitatively demonstrate the magnitude of a single drug's ability to radioprotect normal tissue while radiosensitizing tumor.

Ex Output:
yes


Ex Input:
Question: Do [ Diagnostic and treatment delays modify the treatment outcome of patients with multiform glioblastoma ]?
Answer: In our series neither waiting times nor adjuvant immediate chemotherapy were prognosticator of local control and overall survival outcome of patients with glioblastoma.

Ex Output:

no