Three little boys on a float in a river.
Humans on a river
Boys are humans.
exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & in(x2,x3) & n_river(x3) & n_float(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1) & card_eq_3(x1))
exists s1 x1.(ne_nam_humans(s1) & a_topic(s1) & on(s1,x1) & n_river(x1))