A man playing the guitar is jumping.
The guitarist performs.
If a man is playing the guitar and jumping he is clearly a guitarist that is performing.
exists e2 e1 x1 x2 x3.(n_guitar(x3) & Actor(e2,x1) & v_jump(e2) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1))
exists e1 x1.(n_guitarist(x1) & Actor(e1,x1) & v_perform(e1))