An older sibling and a baby in the living room.
The baby is playing with her older sibling.
Although they are in the living room, it does not imply they are playing.
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 e1 s1 x1 x2.(n_sibling(x2) & r_more(s1) & a_older(s1) & Theme(s1,x2) & of(x2,x1) & n_female(x1) & n_baby(x1) & with(e1,x2) & Actor(e1,x1) & v_play(e1))