Authors:
Gerhard Wohlgenannt
1
;
Dmitry Mouromtsev
1
;
Dmitry Pavlov
2
;
Yury Emelyanov
2
and
Alexey Morozov
2
Affiliations:
1
Faculty of Software Engineering and Computer Systems, ITMO University, St. Petersburg and Russia
;
2
Vismart Ltd., St. Petersburg and Russia
Keyword(s):
Diagrammatic Question Answering, Visual Data Exploration, Knowledge Graphs, QALD.
Related
Ontology
Subjects/Areas/Topics:
Artificial Intelligence
;
Collaboration and e-Services
;
e-Business
;
Enterprise Information Systems
;
Knowledge Engineering and Ontology Development
;
Knowledge-Based Systems
;
Semantic Web
;
Soft Computing
;
Symbolic Systems
Abstract:
With the growing number and size of Linked Data datasets, it is crucial to make the data accessible and useful for users without knowledge of formal query languages. Two approaches towards this goal are knowledge graph visualization and natural language interfaces. Here, we investigate specifically question answering (QA) over Linked Data by comparing a diagrammatic visual approach with existing natural language-based systems. Given a QA benchmark (QALD7), we evaluate a visual method which is based on iteratively creating diagrams until the answer is found, against four QA systems that have natural language queries as input. Besides other benefits, the visual approach provides higher performance, but also requires more manual input. The results indicate that the methods can be used complementary, and that such a combination has a large positive impact on QA performance, and also facilitates additional features such as data exploration.