A chef cooks something in a skillet.
The chef is cooking in a crock pot.
A skillet is different than a crock pot.
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 e1 x1 x2 x3.(n_chef(x1) & in(e1,x2) & n_pot(x2) & of(x2,x3) & n_crock(x3) & Actor(e1,x1) & v_cook(e1))