People are working in the kitchen.
people are making food
Just because the people are working in the kitchen doesn't mean they are making food.
exists e1 x1 x2.(n_kitchen(x2) & in(e1,x2) & Actor(e1,x1) & v_work(e1) & n_people(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_food(x2) & n_people(x1))