Railway employee checking the train wheels.
Human is examining train parts.
in a both sentence train wheels and examining is different
exists e1 x1 x2 x3 x4.(n_wheel(x3) & of(x3,x4) & n_train(x4) & Theme(e1,x3) & Actor(e1,x1) & v_check(e1) & n_employee(x1) & (x1 = x2) & ne_nam_railway(x2))
exists e1 x1 x2 x3.(ne_nam_human(x1) & Theme(e1,x2) & Actor(e1,x1) & v_examine(e1) & n_part(x2) & of(x2,x3) & n_train(x3))