A baby boy sleeps in a stroller.
The little baby boy is laughing.
A boy cannot be laughing if he sleeps.
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 e1 s1 x1 x2.(n_boy(x1) & of(x1,x2) & n_baby(x2) & a_little(s1) & Theme(s1,x1) & Actor(e1,x1) & v_laugh(e1))