Three little boys on a float in a river.
boys float in  a canoe
Boys can float on many objects other than a canoe.
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 e1 x1 x2.(in(e1,x2) & n_canoe(x2) & Actor(e1,x1) & v_float(e1) & n_boy(x1))