Several people walk up a staircase.
The people are chatting as they walk.
People are chatting together while walking up
exists e1 s1 s2 x1 x2.(a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_staircase(x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e1 p1 x1.(n_thing(x1) & n_people(x1) & exists e2.(Actor(e2,x1) & v_walk(e2)) & as(e1,p1) & Actor(e1,x1) & v_chat(e1))