A man is playing a guitar solo
A girl is playing violin.
Either the person is a man or a girl. Guitar is a different instrument than violin.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_solo(x2) & of(x2,x3) & n_guitar(x3) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_violin(x2) & n_girl(x1))