A crowd of people are socializing.
A crowd of people are at a party.
You can not infer there is a party.
exists e1 x1 x2.(Actor(e1,x1) & v_socialize(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists p1 x1 x2.(exists x3.(at(x1,x3) & n_party(x3)) & of(x1,x2) & n_people(x2) & n_crowd(x1))