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: Does in a safety net population HPV4 vaccine adherence worsen as BMI increases?
Answer: Obesity, as well as gravidity and Hispanic race, are risk factors for lack of HPV4 vaccine adherence among young females in a safety net population.

Ex Output:
yes


Ex Input:
Question: Does intravenous insulin therapy during lung resection affect lung function or surfactant proteins?
Answer: According to our observations, short insulin treatment applied intravenously during resection does not affect the quality of breathing.

Ex Output:
no


Ex Input:
Question: Is anemia a risk factor for developing pulmonary embolism?
Answer: Our data demonstrated no relationship between anemia and PE.

Ex Output:

no