A boy runs along a beach while a group of young girls watch.
A boy is running and trips.
One cannot assume that the boy trips.
exists e1 s1 x1 x2 x3 x4 x5.(while(e1,x3) & of(x3,x4) & n_watch(x4) & of(x4,x5) & n_girl(x5) & a_young(s1) & Theme(s1,x4) & n_group(x3) & along(e1,x2) & n_beach(x2) & Actor(e1,x1) & v_run(e1) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_trip(x2) & n_boy(x1))