People are on a roller coaster next to water.
People are on a large airplane.
People can not be on a roller coaster and on a airplane at the same time.
exists p1 x1.(exists x2 x3 x4 x5.(on(x1,x2) & to(x4,x5) & n_water(x5) & next(x2,x4) & n_thing(x4) & n_coaster(x2) & of(x2,x3) & n_roller(x3)) & n_people(x1))
exists p1 x1.(exists s1 x2.(on(x1,x2) & n_airplane(x2) & a_large(s1) & Theme(s1,x2)) & n_people(x1))