You will be given a definition of a task first, then some input of the task.
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.

Question: Does the specificity of tests for anti-beta-lactam IgE antibodies decline progressively with increase of total serum IgE?
Answer: Before 2006, tests for anti-beta-lactam IgE antibody in patients with total IgE > 500 kU/l were probably often false positive. Patients who were diagnosed as penicillin allergic before 2006 solely on the basis of a positive CAP FEIA test for specific IgE should be considered for diagnostic reevaluation.
Output:
yes