A man riding a cart pulled by a donkey.
A man is being pulled by a donkey.
Just because a man is riding a cart pulled by a donkey it does not mean the man is pulled by the donkey.
exists e1 e2 x1 x2 x3 x4.(Actor(e2,x4) & n_donkey(x4) & Theme(e2,x1) & v_pull(e2) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_cart(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Actor(e1,x2) & n_donkey(x2) & Theme(e1,x1) & v_pull(e1) & n_man(x1))