Two boys splash in the big ocean.
Two brown haired boys
Not all boys have brown hair.
exists e1 s1 x1 x2.(n_ocean(x2) & a_big(s1) & Theme(s1,x2) & in(e1,x2) & Actor(e1,x1) & v_splash(e1) & n_boy(x1) & card_eq_2(x1))
exists s1 s2 x1.(n_boy(x1) & a_haired(s2) & Theme(s2,x1) & a_brown(s1) & Theme(s1,x1) & card_eq_2(x1) & a_topic(x1))