people at an outdoor restaurant on the sidewalk
People at a table inside a restaurant.
Outdoor restaurants don't have provisions for people to sit inside.
exists s1 x1 x2 x3.(n_sidewalk(x3) & a_topic(x1) & at(x1,x2) & on(x2,x3) & n_restaurant(x2) & a_outdoor(s1) & Theme(s1,x2) & n_people(x1))
exists x1 x2 x3.(a_topic(x1) & inside(x1,x3) & n_restaurant(x3) & at(x1,x2) & n_table(x2) & n_people(x1))