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: Does a novel biomechanical device improve gait pattern in patient with chronic nonspecific low back pain?
Answer: Patients with NSLBP treated with the novel biomechanical device for 3 months increased walking speed through longer step length and eliminated asymmetrical differences.

Output: yes


Input: Consider Input: Question: Do fat mass and obesity-associated gene polymorphisms affect metabolic response to hormone therapy in healthy postmenopausal women?
Answer: The presence of fat mass and obesity-associated gene risk variants in healthy early postmenopausal women does not adversely affect their response to hormone therapy.

Output: no


Input: Consider Input: Question: Does imiquimod affect shedding of viable chlamydiae in a murine model of Chlamydia trachomatis genital tract infection?
Answer: Imiquimod has no efficacy in controlling C. trachomatis (MoPn) infection in the murine model.


Output: no