A man cooking in a restaurants.
A lady is cooking in a restaurant.
A man and a lady are two different people.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_restaurant(x3) & n_cooking(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(in(e1,x2) & n_restaurant(x2) & Actor(e1,x1) & v_cook(e1) & n_lady(x1))