A mailman in his truck whom is in front of a gate.
Person driving a car stuck behind a railroad crossing.
Person driving behind a railroad crossing doesn't suggest it is a mailman.
exists p1 x1 x2 x3.(exists x4 x5.(in(x1,x4) & of(x4,x5) & n_gate(x5) & n_front(x4)) & in(x1,x2) & n_whom(x2) & of(x2,x3) & n_truck(x3) & of(x2,x1) & n_male(x1) & n_mailman(x1))
exists e1 e2 x1 x2 x3 x4 x5.(ne_nam_person(x1) & Theme(e2,x2) & Actor(e2,x1) & v_drive(e2) & behind(e1,x4) & n_cross(x4) & of(x4,x5) & n_railroad(x5) & Theme(e1,x3) & v_stick(e1) & (x2 = x3) & n_car(x2))