People are working in the kitchen.
people are in the kitchen
Working in the kitchen indicates they are in the kitchen.
exists e1 x1 x2.(n_kitchen(x2) & in(e1,x2) & Actor(e1,x1) & v_work(e1) & n_people(x1))
exists p1 x1 x2.(n_kitchen(x2) & in(x1,x2) & n_people(x1))