A number of people are eating inside a restaurant.
A group of people walking on the floor.
You can either be sitting and eating in a restaurant or walking around, not both.
exists e1 x1 x2 x3.(inside(e1,x3) & n_restaurant(x3) & Actor(e1,x1) & v_eat(e1) & of(x1,x2) & n_people(x2) & n_number(x1))
exists e1 x1 x2 x3 x4.(n_floor(x4) & a_topic(x1) & of(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_people(x2) & n_group(x1))