9th Challenge on Question Answering over Linked Data (QALD-9) (invited paper)
R. Usbeck, R. Hari Gusmita, A.-C. Ngonga Ngomo, M. Saleem, in: K.-S. Choi, L. Espinosa Anke, T. Declerck, D. Gromann, J.-D. Kim, A.-C. Ngonga Ngomo, M. Saleem, R. Usbeck (Eds.), Joint Proceedings of the 4th Workshop on Semantic Deep Learning (SemDeep-4) and NLIWo: Natural Language Interfaces for the Web of Data (NLIWOD-4) and 9th Question Answering over Linked Data Challenge (QALD-9) Co-Located with 17th International Semantic Web Conference (ISWC 2018), Monterey, California, United States of America, October 8th - 9th, 2018, CEUR-WS.org, 2018, pp. 58–64.