Hiilivedyillä

I want to ensure I’m delivering the right kind of article. Hiilivedyillä could refer to different things in Finnish, such as a place name, a geological or mining term related to coal layers, or a hypothetical/fictional concept. Could you specify which sense you want for the wiki-style article (place, concept, or work)? If you’d like, I can also draft a neutral, fictional encyclopedia-style entry for Hiilivedyillä.