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.

Input: Consider Input: Question: Is pseudomonas aeruginosa in CF and non-CF homes found predominantly in drains?
Answer: These findings implicate drains as important potential sources of P. aeruginosa infection. They suggest that maximizing P. aeruginosa control efforts for drains would reduce exposure with minimal extra burden to CF patients and families.

Output: yes


Input: Consider Input: Question: Does revaccination with Bacillus Calmette-Guerin ( BCG ) vaccine reduce morbidity from malaria in African children?
Answer: We found no evidence that BCG revaccination reduces morbidity from malaria.

Output: no


Input: Consider Input: Question: Do cARD15/NOD2 single nucleotide polymorphisms confer susceptibility to type I psoriasis?
Answer: The most complete assessment of CARD15 SNPs in type I psoriasis to date reveals no evidence of association to type I psoriasis.


Output: no