Two people are walking around the grounds of a castle.
To people swimming in the moat.
You cannot be swimming in the moat if you are walking around the grounds of a castle.
exists e1 x1 x2 x3.(n_grounds(x2) & around(e1,x2) & of(x2,x3) & n_castle(x3) & Actor(e1,x1) & v_walk(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_moat(x4) & to(x1,x2) & in(e1,x4) & Actor(e1,x3) & v_swim(e1) & (x2 = x3) & n_people(x2) & n_event(x1))