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 cytoplasmic expression of β-catenin an independent predictor of progression of conventional renal cell carcinoma : a simple immunostaining score?
Answer: Cytoplasmic β-catenin expression is an independent prognostic factor for conventional RCC, and may help to identify patients with a high risk of cancer-specific death and to direct optimized active surveillance or adjuvant therapy.

Ex Output:
yes


Ex Input:
Question: Does implementing goal-directed protocols reduce length of stay after cardiac surgery?
Answer: A milestone-driven pathway supported by team rounding was associated with decreased lengths of CVICU and hospital stay. However, tracking patient trajectories by milestones suggests a more complex relationship than anticipated and presents new opportunities for SREBP implementation and research.

Ex Output:
yes


Ex Input:
Question: Does a large multicentre analysis of CTGF -945 promoter polymorphism confirm association with systemic sclerosis susceptibility or phenotype?
Answer: The results do not confirm previous findings and suggest that the CTGF -945 promoter polymorphism does not play a major role in SSc susceptibility or clinical phenotype.

Ex Output:

no