1. Freebase: a collaboratively created graph database for structuring human knowledge;Bollacker,2008
2. Yago: a core of semantic knowledge;Suchanek,2007
3. Toward an architecture for never-ending language learning;Carlson,2010
4. Dbpedia–a large-scale, multilingual knowledge base extracted from wikipedia;Lehmann;Semant. Web,2015
5. Explicit semantic ranking for academic search via knowledge graph embedding;Xiong,2017