Semantic Keyword-Based Search on Structured Data Sources Third International KEYSTONE Conference, IKC 2017, Gdańsk, Poland, September 11-12, 2017, Revised Selected Papers and COST Action IC1302 Reports - Szymański, Julian; Szymański, Julian; Velegrakis, Yannis; Velegrakis, Yannis (Springer International Publishing : Imprint: Springer, 2018)