Spiros Athanasiou, Giannopoulos Giorgos, Graux Damien, Karagiannakis Nikos, Lehmann Jens, Axel-Cyrille Ngonga Ngomo, Patroumpas Kostas, Mohamed Ahmed Sherif, and Dimitrios Skoutas. Big POI data integration with Linked Data technologies. International Conference on Extending Database Technology 2019, EDBT19, 2019. [PUMA: simba group\_aksw 2019 deer lehmann ngonga sherif dice slipo limes] URL