A lot of people are gathered around a couple of people who are dressed in costumes.
They are performing hypnosis to bring the others to the mother ship.
People are people, not aliens, and thus do not have a mother ship.
exists e2 e1 x1 x2 x3 x4 x5 x6.(around(e1,x3) & of(x3,x4) & in(e2,x6) & n_costume(x6) & Theme(e2,x5) & v_dress(e2) & (x4 = x5) & n_people(x4) & n_couple(x3) & Theme(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_lot(x1))
exists e1 p1 x1 x2 x3 x4.(n_ship(x3) & of(x3,x4) & n_mother(x4) & -(x2 = x1) & n_person(x2) & n_thing(x2) & Topic(e1,p1) & exists e2.(to(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_bring(e2)) & n_person(x1) & Theme(e1,x1) & Actor(e1,x2) & v_perform(e1) & n_hypnosis(x1) & n_thing(x1))