Someone is preparing some kind of food.
Someone is in the kitchen
Preparing food does not imply being in the kitchen.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1) & of(x2,x3) & n_food(x3) & n_kind(x2) & n_person(x1))
exists p1 x1 x2.(n_kitchen(x2) & in(x1,x2) & n_person(x1))