Several people are drinking and socializing at a party.
People are in a movie theater.
People do not have to be several people.  If people are at a party they are not in a movie theater.
exists e2 e1 s1 s2 x1 x2 x3 x4.(at(e2,x4) & n_party(x4) & Actor(e2,x3) & v_socialize(e2) & n_people(x3) & a_several(s2) & Theme(s2,x3) & at(e1,x2) & n_party(x2) & Actor(e1,x1) & v_drink(e1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_theater(x2) & of(x2,x3) & n_movie(x3)) & n_people(x1))