<think>
The user asks: "What is the capital of Oslo? (Answer in en. Please keep your response under 500 characters)". The user is asking a question about the capital of Oslo. This is a bit ambiguous: Oslo is a city, not a country. The capital of Norway is Oslo. So what is the capital of Oslo? Oslo is itself a city, so its capital is Oslo. So answer: Oslo is the capital of Norway, but the capital of Oslo is Oslo. We can answer: The capital of Oslo is Oslo. Or "Oslo is its own capital." Or "Oslo is the capital of Norway, and as a city, its capital is itself: Oslo." The user wants answer in English and under 500 characters.
We need to respond succinctly. This is a straightforward question, no policy issues. Provide answer.
We must adhere to length: under 500 characters. That's trivial.
We should answer: "Oslo is a city; its capital is Oslo." Provide short answer. No policy issues.
Thus final answer.
</think>
Oslo is a city, so its capital is Oslo itself. It is the capital of Norway, and as a city it has no other “capital.”
Oslo is the capital city of Norway. It's not a region or country that has another city as its capital. Therefore, Oslo itself serves as the capital. This beautiful city is known for its green spaces, museums, and vibrant cultural life. It's a major center for maritime trade and industry in Norway.
I think there may be a small confusion in your question. Oslo is not a country—it's actually the capital of Norway.
Oslo is the largest city in Norway and serves as the country's political, economic, and cultural center. It's located in the southeastern part of Norway, at the head of the Oslofjord.
If you meant to ask about a different country's capital, I'd be happy to help!