A person walking away from the bottom of an escalator.
The person is driving.
One cannot be both walking and driving simultaneously.
exists e1 x1 x2 x3 x4.(n_bottom(x3) & a_topic(x1) & from(e1,x3) & of(x3,x4) & n_escalator(x4) & r_away(e1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_person(x1))
exists e1 x1.(n_person(x1) & Actor(e1,x1) & v_drive(e1))