%0 Journal Article %T Natural language question answering over knowledge graph: the marriage of SPARQL query and keyword search %A Hu, Xin %A Duan, Jiangli %A Dang, Depeng %J Knowledge and Information Systems %V 63 %N 4 %P 819-844 %@ 0219-1377 %D 2021-01-15 %I Springer London %~ DeepDyve