Instructions: 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: Question: Does vaccination with DNA vaccines encoding MPB70 or MPB83 or a MPB70 DNA prime-protein boost protect cattle against bovine tuberculosis?
Answer: Vaccination of calves with MPB70 or MPB83 DNA vaccines or with a more immunogenic MPB70 DNA prime-protein boost strategy did not induce protection against bovine tuberculosis.
Output:
no