People are walk and running on a bridge sidewalk.
The people on on the bridge.
People running on a bridge sidewalk are also people on the bridge.
exists e2 e1 s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(e2,s1) & on(e2,x4) & n_sidewalk(x4) & of(x4,x5) & n_bridge(x5) & Actor(e2,x3) & v_run(e2) & n_thing(x3) & subset_of(x1,s1) & Theme(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists s1 x1 x2.(n_bridge(x2) & n_people(x1) & on(s1,x2) & Theme(s1,x1) & a_on(s1))