A man is carrying a red accordion on his back.
The man dropped his instrument.
If he dropped his instrument, he is not carrying an accordion.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & on(x2,x3) & n_back(x3) & of(x3,x1) & n_male(x1) & n_accordion(x2) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_instrument(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_drop(e1))