A chef cooks something in a skillet.
a chef cooking
If someone cooks they are cooking
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_cook(e1) & in(x2,x3) & n_skillet(x3) & n_thing(x2) & n_chef(x1))
exists x1 x2.(a_topic(x1) & n_cooking(x1) & of(x1,x2) & n_chef(x2))