A man performing on a guitar.
A man is holding a guitar.
The guitar is used for performing.
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.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_guitar(x2) & n_man(x1))