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.

Ex Input:
Question: Does intracanal delivery of Resolvin E1 control inflammation in necrotic immature rat teeth?
Answer: RvE1 and TAP had a positive impact on reducing inflammation and promoting root formation. RvE1 was more effective in reducing inflammation at earlier stages. RvE1 has potential to be used as root canal dressing to control inflammation in endodontically compromised teeth before complete root formation. Stability of RvE1 within the root canal and its delivery are issues to be addressed before its clinical use.

Ex Output:
yes


Ex Input:
Question: Does constitutive secretion of Interleukin-4 dictate CD133+ side population cells to resist drug treatment and cell death?
Answer: Our data suggest that the autocrine secretion of IL-4 is a potential target for the development of novel anticancer drugs to prevent the CSCs-mediated therapy failure and tumorigenesis.

Ex Output:
yes


Ex Input:
Question: Does pioglitazone improve the cardio-ankle vascular index in patients with type 2 diabetes mellitus treated with metformin?
Answer: These results suggest that pioglitazone improves CAVI, a BP-independent arterial stiffness parameter, in patients with type 2 diabetes mellitus treated with metformin.

Ex Output:

yes