Grether, Loris
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KvGR: A graph-based interface for explorative sequential question answering on heterogeneous information sources
2020, Witschel, Hans Friedrich, Riesen, Kaspar, Grether, Loris, Jose, Joemon M., Yilmaz, Emine, Magalhães, João, Castells, Pablo, Ferro, Nicola, Silva, Mário J., Martins, Flávio
Exploring a knowledge base is often an iterative process: initially vague information needs are refined by interaction. We propose a novel approach for such interaction that supports sequential question answering (SQA) on knowledge graphs. As opposed to previous work, we focus on exploratory settings, which we support with a visual representation of graph structures, helping users to better understand relationships. In addition, our approach keeps track of context – an important challenge in SQA – by allowing users to make their focus explicit via subgraph selection. Our results show that the interaction principle is either understood immediately or picked up very quickly – and that the possibility of exploring the information space iteratively is appreciated.