People inside a subway car hold on to the rails while people outside the subway car walk away.
There are people inside a subway car holding on to the rails in fear of their safety.
People in subway cars holding rails are not necessarily in fear of their safety.
(x)
exists p1 x1 x6 x8.(n_safety(x8) & of(x8,x6) & n_thing(x6) & n_rail(x6) & exists e1 x2 x3 x4 x5 x7.((x1 = x2) & in(e1,x7) & of(x7,x8) & n_fear(x7) & r_on(e1) & to(e1,x6) & Actor(e1,x5) & v_hold(e1) & (x2 = x5) & inside(x2,x3) & n_car(x3) & of(x3,x4) & n_subway(x4) & n_people(x2)))