Two boys with blue swim caps in the murky water.
the boys are friends
Not all boys are friends.
exists s1 s2 x1 x2 x3 x4.(n_water(x4) & a_murky(s2) & Theme(s2,x4) & a_topic(x1) & with(x1,x2) & in(x2,x4) & n_cap(x2) & of(x2,x3) & n_swim(x3) & a_blue(s1) & Theme(s1,x2) & n_boy(x1) & card_eq_2(x1))
exists p1 x1.(n_boy(x1) & exists x2.((x1 = x2) & n_friend(x2)))