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: Is vitamin D deficiency independently associated with greater prevalence of erectile dysfunction : The National Health and Nutrition Examination Survey ( NHANES ) 2001-2004?
Answer: In this cross-sectional analysis of a representative sample of U.S. men, vitamin D deficiency was associated with an increased prevalence of ED independent of ASCVD risk factors. Additional research is needed to evaluate whether treating vitamin D deficiency improves erectile function.

Ex Output:
yes


Ex Input:
Question: Do dual inhibition of nuclear factor kappa-B and Mdm2 enhance the antitumor effect of radiation therapy for pancreatic cancer?
Answer: Combination therapy of radiation with nafamostat mesilate exerts enhanced anti-tumor effect against human pancreatic cancer.

Ex Output:
yes


Ex Input:
Question: Does telecytopathology for on-site adequacy evaluation decrease the nondiagnostic rate in endoscopic ultrasound-guided fine-needle aspiration of pancreatic lesions?
Answer: Telecytopathology on-site evaluation of EUS-FNA of pancreatic lesions reduces the nondiagnostic rate, especially in lesions with solid characteristics, and may serve as an effective substitute for on-site evaluation by a cytopathologist.

Ex Output:

yes