Workers wearing reflective vests working near a train car.
The workers work for a railroad.
Workers near train cars don't necessarily work for a railroad.
exists e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_wear(e2) & near(e1,x4) & n_car(x4) & of(x4,x5) & n_train(x5) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_vest(x2) & a_reflective(s1) & Theme(s1,x2) & n_worker(x1))
exists e1 x1 x2.(n_worker(x1) & for(e1,x2) & n_railroad(x2) & Actor(e1,x1) & v_work(e1))