A group of people who are wearing costumes are standing in front of a blue building.
Coworkers are by a building in Halloween costumes.
group of people doesn't mean coworkers, and wearing costumes doesn't there Halloween costumes.
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(in(e2,x5) & of(x5,x6) & n_building(x6) & a_blue(s1) & Theme(s1,x6) & n_front(x5) & Actor(e2,x1) & v_stand(e2) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_costume(x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists p1 x1.(exists x2 x3 x4.(by(x1,x2) & in(x2,x3) & n_costume(x3) & (x3 = x4) & ne_geo_halloween(x4) & n_building(x2)) & n_coworker(x1))