A group of people dressed in costumes standing by a fire pit.
They are celebrating halloween.
There are many reasons why people would stand around a fire pit while in costume other than to celebrate Halloween.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & of(x1,x2) & in(e1,x4) & by(e2,x6) & n_pit(x6) & of(x6,x7) & n_fire(x7) & Actor(e2,x5) & v_stand(e2) & (x4 = x5) & n_costume(x4) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_celebrate(e1) & n_halloween(x2))