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 cerebrospinal fluid transferrin levels reduced in patients with early multiple sclerosis?
Answer: Our biochemical study provides evidence that altered iron homeostasis within the brain occurs in the very early phases of the disease, and suggests that the transporter protein transferrin may play a role in the increased iron deposition known to occur in the brain of MS patients.
yes