9th Challenge on Question Answering over Linked Data (QALD-9) (invited paper)
R. Usbeck, R.H. Gusmita, A.-C. Ngonga Ngomo, M. Saleem, in: 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., 2018, pp. 58–64.