Two children and their parents are on the floor opening presents.
Two children are with their family indoors.
If you are on the floor you are probably indoors
exists p1 x1 x2 x3 x4 x5 x6.(n_present(x4) & of(x4,x6) & n_opening(x6) & of(x4,x5) & n_floor(x5) & on(x1,x4) & subset_of(x3,x1) & n_parent(x3) & of(x3,x2) & n_thing(x2) & subset_of(x2,x1) & n_child(x2) & card_eq_2(x2))
exists p1 x1 x2 x3.(with(x1,x2) & n_indoor(x2) & of(x2,x3) & n_family(x3) & of(x2,x1) & n_thing(x1) & n_child(x1) & card_eq_2(x1))