A boy inside a shopping cart.
A girl is hiding inside a shopping cart.
A girl  means a female child, not a boy.
exists x1 x2 x3.(a_topic(x1) & inside(x1,x2) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & n_boy(x1))
exists e1 x1 x2 x3.(inside(e1,x2) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & Actor(e1,x1) & v_hide(e1) & n_girl(x1))