A man is singing and playing a guitar.
A woman plays a violin solo on stage
The man is singing and playing guitar. He is not a woman playing violin.
exists e2 e1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_guitar(x4) & n_man(x3) & Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_guitar(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_solo(x2) & of(x2,x3) & n_violin(x3) & n_woman(x1))