People are eating in a restaurant.
There are people indoors.
in a restaurant is always indoors
exists e1 x1 x2.(in(e1,x2) & n_restaurant(x2) & Actor(e1,x1) & v_eat(e1) & n_people(x1))
exists p1 x1 x2 x3.((x1 = x2) & Time(x2,x3) & n_indoor(x3) & n_people(x2))