A person in black has just stepped off of the escalator.
A person in black is on the elevator
One cannot use both an escalator and an elevator at the same time.
exists e1 s1 s2 x1 x2 x3.(n_escalator(x3) & a_just(s2) & Manner(e1,s2) & of(e1,x3) & r_off(e1) & Actor(e1,x1) & v_step(e1) & Theme(s1,x2) & a_black(s1) & (x1 = x2) & n_person(x1))
exists p1 x1 x2 x3.(n_elevator(x3) & on(x1,x3) & in(x1,x2) & n_black(x2) & n_person(x1))