People selecting food at an event.
The people were picking out their food at the buffet.
It need not be a Buffet always at an event.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x4) & n_event(x4) & Theme(e1,x3) & Actor(e1,x2) & v_select(e1) & n_food(x3) & (x1 = x2) & n_people(x1))
exists e1 s1 x1 x2 x3.(n_buffet(x3) & n_food(x2) & of(x2,x1) & n_thing(x1) & n_people(x1) & a_out(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_pick(e1) & at(x2,x3))