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: Is guideline-concordant administration of prothrombin complex concentrate and vitamin K associated with decreased mortality in patients with severe bleeding under vitamin K antagonist treatment ( EPAHK study )?
Answer: Guideline-concordant VKA reversal with PCC and vitamin K within eight hours after admission was associated with a significant decrease in seven-day mortality.
Output:
yes