People are gathered in a park.
A few people are in the park, waiting for the party.
Just because they are gathered in a park doesn't mean there is a party.
exists e1 x1 x2.(in(e1,x2) & n_park(x2) & Theme(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 p1 s1 x1 x2 x3.(n_party(x2) & n_park(x3) & for(p1,e1) & for(e1,x2) & Actor(e1,x1) & v_wait(e1) & in(x1,x3) & n_people(x1) & a_few(s1) & Theme(s1,x1))