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 common genetic variants related to vitamin D status associated with esophageal squamous cell carcinoma risk in China?
Answer: Our results suggested that common genetic variants related to vitamin D levels are not associated with risk of ESCC in this Chinese population.

Ex Output:
no


Ex Input:
Question: Does mPGES-2 deletion remarkably enhance liver injury in streptozotocin-treated mice via induction of GLUT2?
Answer: mPGES-2 deletion enhanced STZ-induced liver toxicity possibly via GLUT2-mediated STZ uptake, independently of diabetes mellitus.

Ex Output:
yes


Ex Input:
Question: Are mannose-binding lectin gene , MBL2 , polymorphisms associated with susceptibility to invasive pneumococcal disease in children?
Answer: Defective MBL2 polymorphisms did not predict increased IPD susceptibility in children born in Northern Europe.

Ex Output:

no