Five people are sitting inside a building.
5 hostages are sitting inside a building
Sitting inside a building does not imply the people are hostages.
exists e1 x1 x2.(inside(e1,x2) & n_building(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_5(x1))
exists e1 x1 x2.(inside(e1,x2) & n_building(x2) & Actor(e1,x1) & v_sit(e1) & n_hostage(x1) & n_date(x1) & a_date_day_05(x1) & a_date_day_05(x1))