Boy with floaties with his feet in the sand on the beach.
the boy was on a mountain
The boy cannot be both on a mountain and in the sand on the beach at the same time.
exists s1 x1 x2 x3 x4.(n_beach(x4) & n_sand(x3) & ne_nam_boy(s1) & a_topic(s1) & with(s1,x1) & with(x1,x2) & on(x2,x4) & in(x2,x3) & n_foot(x2) & of(x2,x1) & n_male(x1) & n_floaty(x1))
exists p1 x1.(n_boy(x1) & exists x2.(on(x1,x2) & n_mountain(x2)))