a young boy sliding on the grass in an innertube
a boy is on a tube
A young boy is a boy and innertube is a tube.
exists e1 s1 x1 x2 x3 x4.(n_grass(x3) & a_topic(x1) & in(e1,x4) & n_innertube(x4) & on(e1,x3) & Actor(e1,x2) & v_slide(e1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_tube(x2)) & n_boy(x1))