A man with a red hat is playing the drums.
The drummer was very good at playing the drums.
A man playing drums does not necessarily indicate that he is good at it.
exists e1 s1 x1 x2 x3.(n_drum(x3) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & with(x1,x2) & n_hat(x2) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_drum(x3) & n_drummer(x1) & r_very(s1) & at(s1,e1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & Theme(s1,x1) & a_good(s1))