Validating ChatGPT Facts through RDF Knowledge Graphs and Sentence Similarity

no code implementations • 8 Nov 2023 • Michalis Mountantonakis, Yannis Tzitzikas

Since ChatGPT offers detailed responses without justifications, and erroneous facts even for popular persons, events and places, in this paper we present a novel pipeline that retrieves the response of ChatGPT in RDF and tries to validate the ChatGPT facts using one or more RDF Knowledge Graphs (KGs).

Knowledge Graphs Sentence +2

Using Multiple RDF Knowledge Graphs for Enriching ChatGPT Responses

no code implementations • 12 Apr 2023 • Michalis Mountantonakis, Yannis Tzitzikas

For enabling the combination of ChatGPT and RDF KGs, we present a research prototype, called GPToLODS, which is able to enrich any ChatGPT response with more information from hundreds of RDF KGs.

Fact Checking Knowledge Graphs

CS563-QA: A Collection for Evaluating Question Answering Systems

no code implementations • 2 Jul 2019 • Katerina Papantoniou, Yannis Tzitzikas

Question Answering (QA) is a challenging topic since it requires tackling the various difficulties of natural language understanding.

Natural Language Understanding Question Answering

Heuristics-based Query Reordering for Federated Queries in SPARQL 1.1 and SPARQL-LD

2 code implementations • 23 Oct 2018 • Thanos Yannakis, Pavlos Fafalios, Yannis Tzitzikas

The federated query extension of SPARQL 1. 1 allows executing queries distributed over different SPARQL endpoints.

Databases

Spoken Dialogue for Information Navigation

no code implementations • WS 2018 • Alex Papangelis, ros, Panagiotis Papadakos, Yannis Stylianou, Yannis Tzitzikas

Aiming to expand the current research paradigm for training conversational AI agents that can address real-world challenges, we take a step away from traditional slot-filling goal-oriented spoken dialogue systems (SDS) and model the dialogue in a way that allows users to be more expressive in describing their needs.

Information Retrieval slot-filling +2

LD-SDS: Towards an Expressive Spoken Dialogue System based on Linked-Data

no code implementations • 9 Oct 2017 • Alexandros Papangelis, Panagiotis Papadakos, Margarita Kotti, Yannis Stylianou, Yannis Tzitzikas, Dimitris Plexousakis

In this work we discuss the related challenges and describe an approach towards the fusion of state-of-the-art technologies from the Spoken Dialogue Systems (SDS) and the Semantic Web and Information Retrieval domains.

Conversational Search Information Retrieval +4

Tasks that Require, or can Benefit from, Matching Blank Nodes

no code implementations • 30 Oct 2014 • Christina Lantzaki, Yannis Tzitzikas

This paper discusses why we will never `escape' from the problem of having to construct mappings between such unnamed elements in information systems.

The Anatomy of Mitos Web Search Engine

1 code implementation • 14 Mar 2008 • Panagiotis Papadakos, Giorgos Vasiliadis, Yannis Theoharis, Nikos Armenatzoglou, Stella Kopidaki, Yannis Marketakis, Manos Daskalakis, Kostas Karamaroudis, Giorgos Linardakis, Giannis Makrydakis, Vangelis Papathanasiou, Lefteris Sardis, Petros Tsialiamanis, Georgia Troullinou, Kostas Vandikas, Dimitris Velegrakis, Yannis Tzitzikas

Engineering a Web search engine offering effective and efficient information retrieval is a challenging task.

Anatomy Clustering +2