def _set_sitematrix(self):
        """
        capture API sitematrix data in data attribute
        """
        data = self._load_response('sitematrix')

        self.params.update({'title': self.COMMONS})

        matrix = data.get('sitematrix')
        if matrix:
            self.data['sites'] = self._sitelist(matrix)
            self.data['random'] = random.choice(self.data['sites'])
capture API sitematrix data in data attribute