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I'm not a native english speaker (so forgive me for my poor language skills in general :) ) and I'm puzzled by this "whose / which / of which" issue. I have a sentence like this: "BLAA is a project whose purpose is to build and...". To me it sounds that it should have which instead of whose. I was always tought that whose refers to a person and which to a matter, and based on that I would use which but all the articles I read about it seem to say that whose is the way to go. What to do? And please keep the explanations in KISS form ;) Thanks!