Several people walk up a staircase.
The people are coworkers.
People are walking together as a coworkers
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 p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_coworker(x2)))