4 papers
Identifying Notable News Stories
Antonia Saravanou, Giorgio Stefanoni, Edgar Meij
The volume of news content has increased significantly in recent years and systems to process and deliver this information in an automated fashion at scale are becoming increasingl…
Weakly-supervised Contextualization of Knowledge Graph Facts
Nikos Voskarides, Edgar Meij, Ridho Reinanda +5
Knowledge graphs (KGs) model facts about the world, they consist of nodes (entities such as companies and people) that are connected by edges (relations such as founderOf). Facts e…
Estimating the Cardinality of Conjunctive Queries over RDF Data Using Graph Summarisation
Giorgio Stefanoni, Boris Motik, Egor V. Kostylev
Estimating the cardinality (i.e., the number of answers) of conjunctive queries is particularly difficult in RDF systems: queries over RDF data are navigational and thus tend to in…
Introducing Nominals to the Combined Query Answering Approaches for EL
Giorgio Stefanoni, Boris Motik, Ian Horrocks
So-called combined approaches answer a conjunctive query over a description logic ontology in three steps: first, they materialise certain consequences of the ontology and the data…