Path-Enhanced Multi-Relational Question Answering with Knowledge Graph Embeddings
This work addresses knowledge graph incompleteness for question answering systems, offering an incremental enhancement by integrating path semantics.
The paper tackles the problem of multi-relational question answering over incomplete knowledge graphs by incorporating path embeddings alongside triple facts, resulting in improved accuracy and explainability in KBQA models.
The multi-relational Knowledge Base Question Answering (KBQA) system performs multi-hop reasoning over the knowledge graph (KG) to achieve the answer. Recent approaches attempt to introduce the knowledge graph embedding (KGE) technique to handle the KG incompleteness but only consider the triple facts and neglect the significant semantic correlation between paths and multi-relational questions. In this paper, we propose a Path and Knowledge Embedding-Enhanced multi-relational Question Answering model (PKEEQA), which leverages multi-hop paths between entities in the KG to evaluate the ambipolar correlation between a path embedding and a multi-relational question embedding via a customizable path representation mechanism, benefiting for achieving more accurate answers from the perspective of both the triple facts and the extra paths. Experimental results illustrate that PKEEQA improves KBQA models' performance for multi-relational question answering with explainability to some extent derived from paths.