A man with his surfboard stands in the sand.
A man is standing on a beach.
In the sand implies the location is the beach.
exists e1 x1 x2 x3.(n_sand(x3) & in(e1,x3) & Actor(e1,x1) & v_stand(e1) & with(x1,x2) & n_surfboard(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_beach(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))