A baby is playing in a walker.
A young child playing.
Young child is a synonym of a baby.
exists e1 x1 x2.(in(e1,x2) & n_walker(x2) & Actor(e1,x1) & v_play(e1) & n_baby(x1))
exists s1 x1 x2.(a_topic(x1) & n_playing(x1) & of(x1,x2) & n_child(x2) & a_young(s1) & Theme(s1,x1))