People walking on a bridge over water.
There are people in motion.
Walking means you're moving
exists e1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x4) & n_water(x4) & on(e1,x3) & n_bridge(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists p1 x1 x2.(in(p1,x2) & n_motion(x2) & exists x3.((x1 = x3) & n_people(x3)))