Thread:Project:Support desk/Any extensions or advice about implementing "OR" queries (semantic mediawiki)

I am planning how to structure my categories and properites for a Semantic MediWwiki. I have downloaded the latest Semantic Bundle (which includes Semantic Forms).

Looking at the Semantic Forms it appears that all queries use AND for the fields requested, is there any way to implement OR queries?

For example: a capital city beginning in 'B' in Africa OR Europe.