Some sailors are posing on a ship.
Navy shipmen are on a boat in the ocean.
You can not infer the boat is in the ocean.
exists e1 x1 x2.(on(e1,x2) & n_ship(x2) & Actor(e1,x1) & v_pose(e1) & n_sailor(x1))
exists p1 x1 x2 x4.(n_ocean(x4) & exists x3.(on(x1,x3) & in(x3,x4) & n_boat(x3)) & n_shipman(x1) & (x1 = x2) & ne_org_navy(x2))