People in costumes warming up in front of a fire.
The people are in front of a fire.
The people are in front of a fire is part of the description of people in costume.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & a_up(s1) & Manner(e1,s1) & in(e1,x4) & of(x4,x5) & n_fire(x5) & n_front(x4) & Actor(e1,x3) & v_warm(e1) & (x2 = x3) & n_costume(x2) & n_people(x1))
exists p1 x1.(n_people(x1) & exists x2 x3.(in(x1,x2) & of(x2,x3) & n_fire(x3) & n_front(x2)))