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.

Example Input: Question: Does botulinum toxin B increase mouth opening in patients with spastic trismus?
Answer: Botulinum toxin serotype B injections into the masseter muscles effectively reduce hypertonia and provide for better mouth opening, thereby contributing to a positive and desired clinical goal.
Example Output: yes

Example Input: Question: Are copy-number variations enriched for neurodevelopmental genes in children with developmental coordination disorder?
Answer: These findings suggest that there may be shared susceptibility genes for DCD and other neurodevelopmental disorders and highlight the need for thorough phenotyping when investigating the genetics of neurodevelopmental disorders. Furthermore, these data provide compelling evidence supporting a genetic basis for DCD, and further implicate rare CNVs in the aetiology of neurodevelopmental disorders.
Example Output: yes

Example Input: Question: Does seroprevalence of alphavirus antibodies in a cross-sectional study in southwestern Tanzania suggest endemic circulation of chikungunya?
Answer: Alphavirus infections may contribute significantly to the febrile disease burden in the study area, and are associated with several arthropod-borne infections. Their spread seems only limited by factors affecting mosquitoes, and seems less restricted than that of Rift Valley fever.
Example Output:
yes