a. He mentioned the courage of Tom.
b. He mentioned the courage of President Dubcek during the Prague Spring.
Do you find these sentences grammatically correct?
Do you find them natural?
I think they are both grammatical, but (b) sounds natural and (a) doesn't.
I think in (a) 'Tom's courage' would be natural.
I think (b) works although 'President Dubcek's courage' would be more natural.
The question is whether one can use the 'of possessive' instead of the 'apostrophe s possessive in these cases.
I don't know why (b) sounds natural to me and (a) sounds awful.