A little boy takes a picture at the park.
A boy is taking pictures.
A little boy refers to  a boy.
exists e1 s1 x1 x2 x3.(n_park(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & at(x2,x3) & n_picture(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_boy(x1))