A group of people gathered out on a deck.
People are on an escalater at the mall.
Desk and escalater are different.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_deck(x3) & a_out(s1) & Manner(e1,s1) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 x2.(n_mall(x2) & at(p1,x2) & exists x3.(on(x1,x3) & n_escalater(x3)) & n_people(x1))