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: Consider Input: Question: Is cytoplasmic expression of -catenin an independent predictor of progression of conventional renal cell carcinoma : a simple immunostaining score?
Answer: Cytoplasmic -catenin expression is an independent prognostic factor for conventional RCC, and may help to identify patients with a high risk of cancer-specific death and to direct optimized active surveillance or adjuvant therapy.

Output: yes

Input: Consider Input: Question: Does bisphenol A increase atherosclerosis in pregnane X receptor-humanized ApoE deficient mice?
Answer: These findings identify a molecular mechanism that could link BPA exposure to increased risk of CVD in exposed individuals. PXR is therefore a relevant target for future risk assessment of BPA and related environmental chemicals in humans.

Output: yes

Input: Consider Input: Question: Is a cut-off value of 2 cm in tumor size of prognostic value in surgically treated FIGO stage IB cervical cancer?
Answer: The results support that tumor size is of prognostic impact in FIGO stage IB cervical carcinomas. A further substaging is suggested for tumors up to 4.0 cm maximum dimension using a cut-off value of 2.0 cm as discriminator. Patients with tumors 2.0 cm may represent low risk disease.
Output: yes