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: Do gNAS gene variants affect β-blocker-related survival after coronary artery bypass grafting?
Answer: GNAS haplotypes independently associate with an increased risk of death after primary coronary artery bypass graft surgery. These results are most pronounced in patients receiving βAR blockers, strengthening the rationale for personalized treatment, to decrease medication side effects and improve outcomes.

Ex Output:
yes


Ex Input:
Question: Is laser in situ keratomileusis surgery safe for military personnel?
Answer: There is a high risk of potential traumatic flap problems after LASIK and it is not recommended in army service.

Ex Output:
no


Ex Input:
Question: Is indirect foraminal decompression independent of metabolically active facet arthropathy in extreme lateral interbody fusion?
Answer: Significant indirect neural decompression is possible in XLIF, regardless of the presence of metabolically active FA.

Ex Output:

yes