<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _lat_lons_from_geojson(s):
 """Return a latitude-longitude pairs from nested GeoJSON coordinates. GeoJSON coordinates are always stored in (longitude, latitude) order. """

    if len(s) >= 2 and isinstance(s[0], _number) and isinstance(s[0], _number):
        lat, lon = s[1], s[0]
        return [(lat, lon)]
    else:
        return [lat_lon for sub in s for lat_lon in _lat_lons_from_geojson(sub)]