A man in a white shirt plays the drums.
A drummer is doing a drum solo.
It may not be a drum solo, he may be accompanying a performance.
exists e1 s1 x1 x2 x3.(n_drum(x3) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_solo(x2) & a_drum(s1) & Theme(s1,x2) & n_drummer(x1))