public function get_copyright()
{
if ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10, 'rights')) {
return $this->sanitize($return[0]['data'], SimplePie_Misc::atom_10_construct_type($return[0]['attribs']), $this->get_base($return[0]));
} elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_DC_11, 'rights')) {
return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
} elseif ($return = $this->get_item_tags(SIMPLEPIE_NAMESPACE_DC_10, 'rights')) {
return $this->sanitize($return[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT);
} else {
return null;
}
}