A young boy enjoys the surf as the sun sits low on the horizon.
People are playing in the water.
Just because there is a young boy enjoying the surf, it doesn't necessarily mean that there are other people around, or that there are people playing in the water.
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 e1 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_people(x1))