Three are standing on a mountain.
Three people are in a valley.
The people can't be in a valley while on a mountain.
exists e1 x1 x2.(on(e1,x2) & n_mountain(x2) & Actor(e1,x1) & v_stand(e1) & n_thing(x1) & card_eq_3(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_valley(x2)) & n_people(x1) & card_eq_3(x1))