CIAdriehoek

I’m not finding a reliable source for “CIAdriehoek.” Could you provide more context or confirm the spelling? For example, is it a geographic region, an organization, a mathematical concept, or something else? What language or country is it associated with, and what time period or field does it pertain to?

If you’d like, I can proceed in one of two ways:

- Draft a concise, neutral encyclopedia-style entry for CIAdriehoek as a real concept, once you provide the necessary context.

- Create a clearly labeled fictional or hypothetical entry (for use in a fictional work) that explains what CIAdriehoek is within that universe.

Please share any context or details you have, and I will generate a concise, neutral article under 300 words.