Detailed Instructions: 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: Do accumbal -Opioid Receptors Modulate Ethanol Intake in Alcohol-Preferring Alko Alcohol Rats?
Answer: The results provide further evidence for the role of accumbens shell -opioid receptors but not -opioid receptors in mediating reinforcing effects of EtOH and in regulating EtOH consumption. The results also provide support for views suggesting that the nucleus accumbens shell has a major role in mediating EtOH reward.
Solution:
yes