Three people diving into water.
The three people are in a boat.
The people can't be in a boat because they already dove into the water.
exists e1 x1 x2 x3.(a_topic(x1) & into(e1,x3) & n_water(x3) & Actor(e1,x2) & v_dive(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists p1 x1.(n_people(x1) & card_eq_3(x1) & exists x2.(in(x1,x2) & n_boat(x2)))