People inside a subway car hold on to the rails while people outside the subway car walk away.
people are riding on the subway to go home
People don't ride just to go home.
(x)
exists e1 p1 x1 x2 x3.(n_subway(x3) & Topic(e1,p1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x1) & v_go(e2) & n_home(x4)) & on(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_people(x2) & n_people(x1))