Update README.md

Author: wha-kgcode

README.md

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 + Enhancing Large Language Models with Knowledge Graphs for Robust Question Answering
 + OntoFact: Unveiling Fantastic Fact-Skeleton of LLMs via Ontology-Driven Reinforcement Learning
 + Unveiling factuality and injecting knowledge for LLMs via reinforcement learning and data proportion
+  
 9.2  LLM for KG
 + Unifying Large Language Models and Knowledge Graphs: A Roadmap
 + ConsistNER: Towards Instructive NER Demonstrations for LLMs with the Consistency of Ontology and Context