1. Freebase: a collaboratively created graph database for structuring human knowledge;Bollacker,2008
2. Dbpedia: A nucleus for a web of open data;Auer,2007
3. Long short-term memory;Hochreiter;Neural Comput.,1997
4. Knowledge-based question answering by jointly generating, copying and paraphrasing;Zhu,2017
5. Template-based question answering over RDF data;Unger,2012