A group of people outside a barn.
Several people are at a party.
You can not infer they are at a party.
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & outside(x2,x3) & n_barn(x3) & n_people(x2) & n_group(x1))
exists p1 s1 x1.(exists x2.(at(x1,x2) & n_party(x2)) & n_people(x1) & a_several(s1) & Theme(s1,x1))