Many people in dark cloths are drinking and talking together.
People are at a party.
Just because people are drinking and talking together doesn't mean they are at a party.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4.(a_together(s3) & Manner(e2,s3) & Actor(e2,x3) & v_talk(e2) & in(x3,x4) & n_cloth(x4) & a_dark(s2) & Theme(s2,x4) & n_people(x3) & n_quantity(x3) & Actor(e1,x1) & v_drink(e1) & in(x1,x2) & n_cloth(x2) & a_dark(s1) & Theme(s1,x2) & n_people(x1) & n_quantity(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_party(x2)) & n_people(x1))