A young boy enjoys the surf as the sun sits low on the horizon.
A young boy is on vacation at the beach.
Just because there is a young boy enjoying the surf, it doesn't necessarily mean that he is on vacation or at the beach.
exists e1 p1 s1 x1 x2 x3 x4.(n_horizon(x4) & n_sun(x3) & n_surf(x2) & exists e2 p2.(on(e2,x4) & exists s2.(Theme(s2,x3) & a_low(s2)) & Topic(e2,p2) & Actor(e2,x3) & v_sit(e2)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists p1 s1 x1 x2.(n_beach(x2) & at(p1,x2) & exists x3.(on(x1,x3) & n_vacation(x3)) & n_boy(x1) & a_young(s1) & Theme(s1,x1))