Given self.resource, split information from the CTS API

        :return: None

def _parse(self):
        """ Given self.resource, split information from the CTS API

        :return: None
        """
        self.response = self.resource
        self.resource = self.resource.xpath("//ti:passage/tei:TEI", namespaces=XPATH_NAMESPACES)[0]

        self._prev_id, self._next_id = _SharedMethod.prevnext(self.response)

        if not self.citation.is_set() and len(self.resource.xpath("//ti:citation", namespaces=XPATH_NAMESPACES)):
            self.citation = CtsCollection.XmlCtsCitation.ingest(
                self.response,
                xpath=".//ti:citation[not(ancestor::ti:citation)]"
            )