A blond man is singing and playing guitar.
The man is a redhead
Blonde and redhead aren't the same hair color.
exists e1 e2 s1 s2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_guitar(x4) & n_man(x3) & a_blond(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_guitar(x2) & n_man(x1) & a_blond(s1) & Theme(s1,x1))
exists p1 x1.(n_man(x1) & exists x2.((x1 = x2) & n_redhead(x2)))