Two children are walking down the sidewalk along side a yellow and white wall.
The children are riding in the car.
Walking down a sidewalk must be done while on one's own feet, it cannot be done while riding in a vehicle.
exists e1 x1 x2.(n_sidewalk(x2) & all x3 s1 s2.((n_wall(x3) & a_white(s2) & Theme(s2,x3) & a_yellow(s1) & Theme(s1,x3)) -> exists x4.(along(e1,x4) & for(x4,x3) & n_side(x4))) & down(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_car(x2) & n_child(x1) & in(e1,x2) & Actor(e1,x1) & v_ride(e1))