A baby chews on a toy dump truck.
A baby eats baby food.
There can either be a toy dump truck or baby food.
exists e1 x1 x2 x3 x4.(on(e1,x2) & n_truck(x2) & of(x2,x4) & n_dump(x4) & of(x2,x3) & n_toy(x3) & Actor(e1,x1) & v_chew(e1) & n_baby(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_food(x2) & of(x2,x3) & n_baby(x3) & n_baby(x1))