Keynote Speaker: Efi Tsamoura

We are delighted to announce that Efi Tsamoura will give a Keynote at the 20th Edition of ESWC titeled

Reasoning at Scale: Why, How and What’s Next.

Abstract: Can we reason over knowledge graphs consisting of billions of facts using commodity hardware? And what if the underlying facts are true only with some probability? While the above questions originally concerned the data management community, the efforts to incorporate symbolic knowledge into deep models, as well as the rise of Web-scale probabilistic knowledge bases, sent a strong message: we need reasoning techniques that, firstly, can scale and, secondly, can support uncertainty under well-established semantics.

In this talk, Efi will present reasoning techniques that allow us to answer positively the above two questions: in the absence of uncertainty, they can materialize knowledge graphs with 17 billion facts in less than 40 min using a single commodity machine; when the underlying facts are uncertain, e.g., they correspond to a deep classifier’s predictions, they support complex neuro-symbolic scenarios, meaning the difference between answering queries in seconds to not answering them at all even under approximations.

Keynote Speaker: Marieke van Erp

We are happy to announce that Marieke van Erp will be giving a Keynote at the 20th edition of ESWC. She will talk about Unflattening Knowledge Graphs. We are looking forward to her exciting talk!

Abstract: Investigating complex entities and concepts is at the core of humanities research. The concept coffee can for example refer to the plant that yields coffee seeds, the beverage ‘coffee’, and the activity of drinking the beverage. Moreover, it has a long history that is deeply connected to colonialism and status. All of these notions are of interest to humanities scholars as they are an intricate part of national identities, have changed dramatically over time, and connect to many different narratives with different opinions on them. This complexity is not captured in knowledge graphs, but Semantic Web technology has has become such an important tool that it is essential to address this complexity. In this talk, Marieke will present recent work on modelling complex concepts, dealing with contentiousness, and the most pressing challenges to unflatten knowledge graphs, for humanities research and other domains.