People walking down the street in costumes, including one of a hospital gown that exposes the buttocks.
The people are dressed up for Halloween.
Just because people walking down the street in costumes don't mean they dressed for halloween.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_buttock(x9) & n_street(x3) & a_topic(x1) & down(e1,x3) & in(x3,x4) & include(x4,x5) & of(x5,x6) & Theme(e2,x9) & Actor(e2,x8) & v_expose(e2) & (x6 = x8) & n_gown(x6) & of(x6,x7) & n_hospital(x7) & n_thing(x5) & card_eq_1(x5) & n_costume(x4) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists e1 s1 x1 x2.(ne_geo_halloween(x2) & n_people(x1) & a_up(s1) & Manner(e1,s1) & for(e1,x2) & Theme(e1,x1) & v_dress(e1))