Detailed 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.
Q: Question: Does reduction of treatment frequency and UVA dose substantially compromise the antipsoriatic effect of oral psoralen-UVA?
Answer: Reducing treatment frequency and UVA dose does not substantially compromise the therapeutic efficacy of PUVA.
A:
no