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: Are cXXC4 mRNA levels associated with clinicopathological parameters and survival of myelodysplastic syndrome patients?
Answer: This study demonstrated that the age of patients and levels of CXXC4 mRNA, hemoglobin, and marrow blast associated with survival of MDS patients.

Ex Output:
yes

Ex Input:
Question: Is patient satisfaction biased by renovations to the interior of a primary care office : a pretest-posttest assessment?
Answer: Renovating the interior of a primary care office was associated with improved patient satisfaction, including satisfaction in domains otherwise unchanged. Physician skills and patient satisfaction sometimes depend on surrounding factors that may bias the ability of patients to assess the quality of medical care. These biases should be taken into account when quality assessment instruments are designed for patients.

Ex Output:
yes

Ex Input:
Question: Does cinacalcet affect the pharmacokinetics or pharmacodynamics of warfarin?
Answer: Warfarin pharmacokinetics/pharmacodynamics were not affected in subjects treated with warfarin 25mg who received cinacalcet 30 mg twice daily, thus suggesting that dose adjustment is not required.

Ex Output:
no