A person is in an operating room.
A person at the hospital.
Operating rooms are located at the hospital.
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_room(x2) & of(x2,x3) & n_operating(x3)) & n_person(x1))
exists x1 x2.(n_hospital(x2) & a_topic(x1) & at(x1,x2) & n_person(x1))