A group of people are at a party
There is more than one person at the party.
If your at a party then you are also at the party
exists p1 x1 x2.(exists x3.(at(x1,x3) & n_party(x3)) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 x4.(n_party(x4) & exists s1 x2 x3.((x1 = x2) & at(x2,x4) & than(s1,x3) & card_eq_1(x3) & Theme(s1,x2) & a_more(s1) & n_person(x2)))