a young boy sliding on the grass in an innertube
a boy pretends he is tubing down a creek
The boy may not be in the act of pretends and readily enjoying the grass.   If he is pretending, a creek is only onle possibility.
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 e1 p1 x1.(exists e2 s1 x2.(a_down(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_tube(e2) & n_creek(x2)) & n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_pretend(e1) & n_boy(x1))