There are people on the beach in the sand.
there are people outdoors
People  on the beach are outdoors.
exists p1 x1 x2 x4.(n_sand(x2) & n_beach(x4) & in(p1,x2) & exists x3.((x1 = x3) & on(x3,x4) & n_people(x3)))
exists p1 x1 x2 x3.((x1 = x2) & Time(x2,x3) & n_outdoors(x3) & n_people(x2))