A man and a woman are talking in a restaurant.
They are on a date.
Just because a man and woman are in a restaurant does not mean they are on a date.
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_restaurant(x4) & Actor(e1,x1) & v_talk(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists p1 x1.(n_thing(x1) & exists x2.(on(x1,x2) & n_date(x2)))