Open Knowledge Extraction Challenge 2018. - René Speck; Michael Röder; Felix Conrads; Hyndavi Rebba; Catherine Camilla Romiyo; Gurudevi Salakki; Rutuja Suryawanshi; Danish Ahmed; Nikit Srivastava; Mohit Mahajan; Axel-Cyrille Ngonga Ngomo (SemWebEval@ESWC, 2018)