Two little boys are throwing stones into a pond.
Kids throw rocks.
stones and rocks are synonyms.
exists e1 s1 x1 x2 x3.(into(e1,x3) & n_pond(x3) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_stone(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_rock(x2) & n_kid(x1))