Three little boys on a float in a river.
Three boys play hopscotch on the sidewalk.
There are no sidewalks on a float.
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 x3.(n_sidewalk(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_hopscotch(x2) & n_boy(x1) & card_eq_3(x1))