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.

Q: Question: Do progesterone receptor and PTEN expression predict survival in patients with low- and intermediate-grade pancreatic neuroendocrine tumors?
Answer: Combined immunohistochemical assessment of PR and PTEN may help identify a small subset of PanNETs with more aggressive behavior and may aid in risk stratification.

A: yes
****
Q: Question: Do increased homocysteine levels exist in women with preeclampsia from early pregnancy?
Answer: Our results indicate that higher homocysteine levels exist in women with PE from early pregnancy and continue till delivery.

A: yes
****
Q: Question: Does the COMFORT behaviour scale detect clinically meaningful effects of analgesic and sedative treatment?
Answer: This is the first study demonstrating that the COMFORT-B scale detects treatment-related changes in pain or distress intensity. This implies that COMFORT-B assessments can effectively guide analgesic and sedation treatment in critically ill children.

A:
yes
****