A man is walking in the woods.
A woman walks in the woods.
One cannot be a man and woman simultaneiously
exists e1 x1 x2.(n_wood(x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
exists e1 x1 x2.(n_wood(x2) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1))