For example, the KORE 50 (Hoffart et al., 2012) and DBpedia Spotlight (Mendes et al., 2011) data sets are publicly available, converted into NIF and contain news topics from different domains.
they both rely on DBpedia -"the central point of the Linked Open Data movement," according to  (Roder et al., 2014) and thus are not capable of delivering results on other KGs.