A child is taking someone's picture.
A person has a camera.
A child is a person, and you need a camera to take a picture.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_picture(x3) & of(x3,x2) & n_person(x2) & n_child(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_camera(x2) & n_person(x1))