RDF question/answering (Q/A) allows users to ask questions in natural languages over a knowledge base represented by RDF. To answer a national language question, the existing work takes a two-stage approach: question understanding and query evaluation. Their focus is on question understanding to deal with the disambiguation of the natural language phrases.… (More)
Graph-based SPARQL Query Engine," accepted by VLDB Journal (VLDB J), to appear. Efficient processing of label-constraint reachability queries in large graphs. efficient subgraph matching method over large and dense graphs.