A man performing on a guitar.
A man is performing for his fans.
Performing does not imply it is for fans.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_guitar(x3) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(for(e1,x2) & n_fan(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_perform(e1) & n_man(x1))