A young boy casting his fishing line off a pier
There is a worm on the end of the hook.
A worm is not the only possible type of fishing bait. Anything could be on the fishing line or end of the hook.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & off(e1,x5) & n_pier(x5) & Theme(e1,x3) & Actor(e1,x2) & v_cast(e1) & n_line(x3) & of(x3,x4) & n_fishing(x4) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1 x3 x4.(n_hook(x4) & n_end(x3) & exists x2.((x1 = x2) & on(x2,x3) & of(x3,x4) & n_worm(x2)))