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.

Question: Are high levels of serum mannose-binding lectins associated with the severity and clinical outcomes of severe traumatic brain injury?
Answer: Increased serum level of MBL was independently associated with head trauma severity and long-term clinical outcomes of STBI.
yes