def _extract_rel_text_keywords(self, rel_texts: List[str]) -> List[str]:
        """Find the keywords for given rel text triplets."""
        keywords = []

        for rel_text in rel_texts:
            splited_texts = rel_text.split(",")

            if len(splited_texts) <= 0:
                continue
            keyword = splited_texts[0]
            if keyword:
                keywords.append(keyword.strip("(\"'"))

            # Return the Object as well
            if len(splited_texts) <= 2:
                continue
            keyword = splited_texts[2]
            if keyword:
                keywords.append(keyword.strip(" ()\"'"))
        return keywords
Find the keywords for given rel text triplets.
llama-index-core/llama_index/core/indices/knowledge_graph/retrievers.py