Well I do think Oakland California is the most populous and well-known city of that name so it's a resonable assumption that's what the article is about. I dont

Well I do think Oakland California is the most populous and well-known city of that name so it's a resonable assumption that's what the article is about. I dont disagree that it's a good idea to be as clear as possible in titles. But if I saw an article about Madrid, I'd probably assume it's the one in Spain even if I happened to live in Madrid, Iowa. I guess the question is whether Oakland, CA has enough prominence to be known widely outside the region. And I do think it's a major city in its own right, not just in its relation to San Francisco.