TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: yes

PROBLEM: Question: Do why social workers implement decisions to remove children at risk from home?
Answer: Further study is required to examine the generalizability of these findings to other countries, to understand better the reasons for the non-implementation, and to follow-up on the consequences of the non-implementation.

SOLUTION: no

PROBLEM: Question: Does impairment of the metabolism of dipyrone in asymptomatic carriers of the hepatitis-B virus occur in rapid acetylators?
Answer: The effect of hepatic viral carrier state on drug metabolism may vary according to metabolic pathways and genetic polymorphism.

SOLUTION:
no