[trans]

Dear tdol,
I really felt sorry for another asking after you first helpful response, being afraid to get no further comment as a pronounced flooder. Thank you very much for these hoped-for and meaningful explanations I failed to come across otherwise.
(All this might seem obvious to native speakers, but in Russian we use the same genitive constructions in both cases, choosing between *what type of music and *music of what type; *what colour of coat and *coat of what colour, depending on what is more an object of the verb, and this choice sometimes makes no significant difference. We also ask questions to the nouns in genitive. That's where our "wh-questions" to "postmodifiers with of" like *A coat of what colour did he choose? or *What colour of coat did he choose? do come from. That's it.)
Thank you once again.
Yours Trans.