Two people are dressed in animal costumes and are walking down a street.
Two people in animal costumes are walking.
The two people are walking in costumes.  Costumes are worn for Halloween trick or treating.  Halloween trick or treating involves walking door to door.  To get to the doors people would be walking walk up and down streets.
exists e1 e2 x1 x2 x3 x4 x5.(down(e2,x5) & n_street(x5) & Actor(e2,x4) & v_walk(e2) & n_people(x4) & card_eq_2(x4) & in(e1,x2) & n_costume(x2) & of(x2,x3) & n_animal(x3) & Theme(e1,x1) & v_dress(e1) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_costume(x2) & of(x2,x3) & n_animal(x3) & n_people(x1) & card_eq_2(x1))