This is a man with a ponytail playing drums.
A man is playing guitar.
Man can either be playing drums or guitar but not both at the same time.
exists p1 x1.(n_thing(x1) & exists s1 x2 x3 x4.((x1 = x2) & with(x2,x3) & n_drum(x3) & of(x3,x4) & n_playing(x4) & a_ponytail(s1) & Theme(s1,x3) & n_man(x2)))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))