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.

Example Input: Question: Does the bradykinin B1 receptor antagonist BI113823 reverse inflammatory hyperalgesia by desensitization of peripheral and spinal neurons?
Answer: The selective bradykinin B1 receptor antagonist BI113823 reduces CFA-induced mechanical hyperalgesia which is mediated via antagonism of peripheral as well as spinal bradykinin B1 receptors. The selective modulation of CFA-sensitized spinal NS neurons by BI113823 could be a promising property for the treatment of inflammatory pain.
Example Output: yes

Example Input: Question: Are ethnic variations in uterine leiomyoma biology caused by differences in myometrial estrogen receptor alpha levels?
Answer: Neither on a transcriptional nor on a protein level were there statistically relevant differences in steroid hormone receptor levels. A causative role for these receptors in the ethnic variation of leiomyoma biology seems unlikely.
Example Output: no

Example Input: Question: Are serum levels of activin A and inhibin A related to the increased susceptibility to pre-eclampsia in type I diabetic pregnancies?
Answer: Serum concentrations of activin A and inhibin A could not predict preeclampsia in type I diabetes.
Example Output:
no