I have an index of with City, State and Zip fields. If I search with zip, of course, I have no problem, but of course if I search for just the city state combination I am getting a hit for every zip. Can anyone think of a good way to only get one match despite the number of City, State, Zip combos for any given City, State?

In other words, if I search for "Mill Valley, CA", I am getting a match for every Mill Valley, CA zip code, but in that case I only want one match.

Thanks for any help. I'm new to Lucene, obviously...