Boys wearing jeans and hooded sweatshirts stand on a sidewalk, and one of them is holding a black plastic bag.
The people are walking.
Just because the boys are standing on the sidewalk doesn't mean that people are walking.
exists e3 e2 e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(Theme(e3,x8) & Actor(e3,x7) & v_hold(e3) & n_bag(x8) & of(x8,x9) & n_plastic(x9) & a_black(s2) & Theme(s2,x8) & of(x7,x8) & n_thing(x8) & n_thing(x7) & card_eq_1(x7) & on(e2,x6) & n_sidewalk(x6) & Actor(e2,x1) & v_stand(e2) & subset_of(x5,x1) & n_sweatshirt(x5) & a_hood(s1) & Theme(s1,x5) & subset_of(x2,x1) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_jeans(x4) & (x2 = x3) & n_boy(x2))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_walk(e1))