A young boy casting his fishing line off a pier
The young boy is wearing a straw hat.
A young boy casting a fishing line is not necessarily wearing a straw hat.
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 e1 s1 x1 x2 x3.(n_boy(x1) & a_young(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & of(x2,x3) & n_straw(x3))