I know it's impolite to say that here, but if you actually read the rest of my reply, you'd see that in my opinion the best answer for a Q&A site would be "The

I know it's impolite to say that here, but if you actually read the rest of my reply, you'd see that in my opinion the best answer for a Q&A site would be "The restaurant burned a year ago, but it was at 450, Blahblah street". Maybe I didn't make it clear enough before, but I am saying it now. Consider that the asker might just using the restaurant as a reference to some other place. Or someone "hearing" the answer in the future wanted to know the address to visit the ruins. The information might still be useful. Consider that you might not always know better. If this were a chatroom or forum, fine, answer informally. But we're talking in the context of a Q&A webiste.