knowledge-aware-recommendation 4 knowledge-graph 4 recommender-system 4 explainable-recommendation 3 knowledge-based-recommendation 2 knowledge-graph-dataset 2 knowledge-graph-for-recommendation 2 reinforcement-learning 2 library 1 path-reasoning 1 recommendation-system 1 explainations 1 explanation-quality 1 knowledge-graph-completion 1 knowledge-graph-embeddings 1 knowledge-graphs 1 mdp 1 metrics 1 recommender-systems 1 recsys 1 explainable-ai 1 deep-reinforcement-learning 1 beyond-accuracy 1 www2020 1 reinforcement-learning-algorithms 1 negative-sampling 1 kdd2019 1 high-order-connectivity 1 graph-neural-networks 1 graph-attention-networks 1 embedding-propagation 1