Two people picking up trash on the side of the road.
Two people are by a road.
picking up trash on the side of the road is inferred as by a road.
exists e1 s1 x1 x2 x3 x4 x5.(n_road(x5) & n_side(x4) & a_topic(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_pick(e1) & on(x3,x4) & of(x4,x5) & n_trash(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(by(x1,x2) & n_road(x2)) & n_people(x1) & card_eq_2(x1))