@classmethod
def get_anchors(cls, url):
    """urlの文書に含まれるアンカー配列を返す

        Args:
            url:

        Returns:
            list(str): URL配列を返す
        """
    query = (
        f'MATCH (n:Node{{url:"{url}"}}) MATCH (n)-[r:Link]->(to:Node) return r, to'
        )
    anchors = []
    with cls.DRIVER.session() as session:
        for record in session.run(query):
            data = {'to_url': record[0].nodes[1]['url'], 'heuristic':
                record[0]['heuristic'], 'pheromone': record[0]['pheromone']}
            anchors.append(data)
    return anchors
