There are several people going up the escalator.
People are inside an elevator
Are people inside an elevator or going up an escalator
exists p1 x1 x4.(n_escalator(x4) & exists e1 s1 s2 x2 x3.((x1 = x2) & Time(e1,x4) & a_up(s2) & Manner(e1,s2) & Actor(e1,x3) & v_go(e1) & (x2 = x3) & n_people(x2) & a_several(s1) & Theme(s1,x2)))
exists p1 x1.(exists x2.(inside(x1,x2) & n_elevator(x2)) & n_people(x1))