A baby boy sleeps in a stroller.
There is a child sleeping while being pushed in a stroller.
The child is not necessarily being pushed.
exists e1 x1 x2 x3.(in(e1,x3) & n_stroller(x3) & Actor(e1,x1) & v_sleep(e1) & n_boy(x1) & of(x1,x2) & n_baby(x2))
exists p1 x1 e2 e1 x2 x3 x4.((x1 = x2) & while(e1,e2) & in(e2,x4) & n_stroller(x4) & Theme(e2,x3) & v_push(e2) & Actor(e1,x3) & v_sleep(e1) & (x2 = x3) & n_child(x2))