Three little girls smiling.
Four happy little boys
There are either three or four, either boys or girls, not both at the same time.
exists e1 s1 x1.(Actor(e1,x1) & v_smile(e1) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_3(x1))
exists s1 s2 x1.(n_boy(x1) & a_little(s2) & Theme(s2,x1) & a_happy(s1) & Theme(s1,x1) & card_eq_4(x1) & a_topic(x1))