A bellhop is pushing a cart.
the bellhop is pushing the cart with an ox
The bellhop cannot be pushing the cart with an ox while pushing a cart.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_cart(x2) & n_bellhop(x1))
exists e1 x1 x2 x3.(n_cart(x2) & n_bellhop(x1) & with(e1,x3) & n_ox(x3) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1))