@staticmethod
def subtract_lists(similar_articles, blacklisted_articles):
    """
        Helper function to perform a set subtract between the list of articles returned by faiss and blacklisted
        articles for the given IFP by users
        :param similar_articles:  list of similar articles to the query as returned by FAISS
        :param blacklisted_articles: blacklisted articles for this query as set by users on SAGE
        :return: similar_articles - blacklisted_articles
        """
    return list(set(similar_articles) - set(blacklisted_articles))
