An older sibling and a baby in the living room.
Two kids are in the living room.
Sibling and baby are two kids, and living room is self explanatory.
exists s1 s2 x1 x2 x3 x4.(n_room(x3) & of(x3,x4) & n_living(x4) & a_topic(s1) & subset_of(x2,s1) & in(x2,x3) & n_baby(x2) & subset_of(x1,s1) & n_sibling(x1) & r_more(s2) & a_older(s2) & Theme(s2,x1))
exists p1 x1 x2 x3.(n_room(x2) & of(x2,x3) & n_living(x3) & in(x1,x2) & n_kid(x1) & card_eq_2(x1))