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 Q]: Question: Does single copy of variant CYP2A6 alleles confer susceptibility to liver dysfunction in patients treated with coumarin?
Answer: No evidence was obtained that the studied polymorphism in CYP2A6 is a determinant of the coumarin-associated liver dysfunction.
[EX A]: no

[EX Q]: Question: Does discovery-based protein expression profiling identify distinct subgroups and pathways in leiomyosarcomas?
Answer: These results suggest that UPS tumors share a similar lineage as leiomyosarcomas and are likely to originate from different stages of differentiation from mesenchymal stem cells to smooth muscle cells.
[EX A]: yes

[EX Q]: Question: Does increased stool sampling during a waterborne outbreak of cryptosporidiosis increase the detection of other faecal pathogens?
Answer: This study found no evidence of under ascertainment of gastrointestinal infection (common bacterial pathogens and rotavirus) by local general practitioners.
[EX A]:
no