People are at a party at night.
People are talking with eachother
people are talking to each other at a party
exists p1 x1 x2.(at(p1,x2) & n_night(x2) & exists x3.(at(x1,x3) & n_party(x3)) & n_people(x1))
exists e1 x1 x2.(with(e1,x2) & n_eachother(x2) & Actor(e1,x1) & v_talk(e1) & n_people(x1))