A group of girls wearing costumes stand in a park.
The girls are in a park.
The girls refer to a group of girls and they being wearing costumes standing in a park means they are in a park.
exists e2 e1 x1 x2 x3 x4 x5.(in(e2,x5) & n_park(x5) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_costume(x4) & (x1 = x3) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists p1 x1.(n_girl(x1) & exists x2.(in(x1,x2) & n_park(x2)))