A man with a beard is eating.
The man eating food, does not have a neard.
it is not possible to have and not have a beard
exists e1 x1 x2.(Actor(e1,x1) & v_eat(e1) & with(x1,x2) & n_beard(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & -exists e2 x4.(Theme(e2,x4) & Actor(e2,x1) & v_have(e2) & n_neard(x4)) & Theme(e1,x3) & Actor(e1,x2) & v_eat(e1) & n_food(x3) & (x1 = x2))