Lots of people on a boat.
Lots of people are in a building
Being on a boat and in a building is two different places.
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & on(x2,x3) & n_boat(x3) & n_people(x2) & n_lot(x1))
exists p1 x1 x2.(exists x3.(in(x1,x3) & n_building(x3)) & of(x1,x2) & n_people(x2) & n_lot(x1))