A black gentleman is dancing on a tile floor.
A black man in a nice suit dances.
A man does not have to be a gentleman.  Just because a man dances on the floor it does not mean he is in a nice suit.
exists e1 s1 s2 x1 x2.(on(e1,x2) & n_floor(x2) & a_tile(s2) & Theme(s2,x2) & Actor(e1,x1) & v_dance(e1) & n_gentleman(x1) & a_black(s1) & Theme(s1,x1))
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_dance(x2) & of(x2,x3) & n_suit(x3) & a_nice(s2) & Theme(s2,x2) & n_man(x1) & a_black(s1) & Theme(s1,x1))