The two young children are in black and white face paint and costumes while riding in a stroller, they are being pushed by a man also in face paint and a costume
Some of the young children are participating in the costume contest.
Children do not have to be participating in the costume contest just because they wear costumes.
exists e1 p1 p2 s1 x1 x2.(n_thing(x1) & n_child(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1) & while(p1,e1) & in(e1,x2) & exists e2 s4 x7 x8 x9 x10 x11.(in(e2,x8) & subset_of(x11,x8) & n_costume(x11) & subset_of(x9,x8) & n_paint(x9) & of(x9,x10) & n_face(x10) & a_also(s4) & Manner(e2,s4) & Actor(e2,x7) & n_man(x7) & Theme(e2,x1) & v_push(e2)) & that(x2,p2) & n_stroller(x2) & Actor(e1,x1) & v_ride(e1) & exists s2 s3 x3 x4 x5 x6.(in(x1,x3) & subset_of(x6,x3) & n_costume(x6) & subset_of(x4,x3) & n_paint(x4) & of(x4,x5) & n_face(x5) & a_white(s3) & Theme(s3,x4) & a_black(s2) & Theme(s2,x4)))
exists e1 s1 x1 x2 x3 x4.(n_contest(x3) & of(x3,x4) & n_costume(x4) & n_child(x2) & a_young(s1) & Theme(s1,x2) & in(e1,x3) & Actor(e1,x1) & v_participate(e1) & of(x1,x2) & n_thing(x1))