def get_keys_from_osm_json(osm_json):
    """
    Obtain all keys from queried OSM results, and do not include repeated elements.

    Parameters
    ----------
    osm_json : JSON

    Returns
    -------
    List
    """

    osm_keys = []
    for element in osm_json['elements']:
        keys = list(element["tags"].keys())
    
        osm_keys = list(set(osm_keys + keys))
    
    return osm_keys