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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence, 36 / No. 5: AAAI-22 Technical Tracks 5

TempoQR: Temporal Question Reasoning over Knowledge Graphs

February 1, 2023

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Authors

Costas Mavromatis

University of Minnesota


Prasanna Lakkur Subramanyam

University of Massachusetts Amherst


Vassilis N. Ioannidis

Amazon


Adesoji Adeshina

Amazon


Phillip R Howard

Intel Labs


Tetiana Grinberg

Intel Labs


Nagib Hakim

Intel Corporation


George Karypis

Amazon


DOI:

10.1609/aaai.v36i5.20526


Abstract:

Knowledge Graph Question Answering (KGQA) involves retrieving facts from a Knowledge Graph (KG) using natural language queries. A KG is a curated set of facts consisting of entities linked by relations. Certain facts include also temporal information forming a Temporal KG (TKG). Although many natural questions involve explicit or implicit time constraints, question answering (QA) over TKGs has been a relatively unexplored area. Existing solutions are mainly designed for simple temporal questions that can be answered directly by a single TKG fact. This paper puts forth a comprehensive embedding-based framework for answering complex questions over TKGs. Our method termed temporal question reasoning (TempoQR) exploits TKG embeddings to ground the question to the specific entities and time scope it refers to. It does so by augmenting the question embeddings with context, entity and time-aware information by employing three specialized modules. The first computes a textual representation of a given question, the second combines it with the entity embeddings for entities involved in the question, and the third generates question-specific time embeddings. Finally, a transformer-based encoder learns to fuse the generated temporal information with the question representation, which is used for answer predictions. Extensive experiments show that TempoQR improves accuracy by 25--45 percentage points on complex temporal questions over state-of-the-art approaches and it generalizes better to unseen question types.

Topics: AAAI

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HOW TO CITE:

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis TempoQR: Temporal Question Reasoning over Knowledge Graphs Proceedings of the AAAI Conference on Artificial Intelligence (2022) 5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis TempoQR: Temporal Question Reasoning over Knowledge Graphs AAAI 2022, 5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis (2022). TempoQR: Temporal Question Reasoning over Knowledge Graphs. Proceedings of the AAAI Conference on Artificial Intelligence, 5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. TempoQR: Temporal Question Reasoning over Knowledge Graphs. Proceedings of the AAAI Conference on Artificial Intelligence 2022 p.5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. 2022. TempoQR: Temporal Question Reasoning over Knowledge Graphs. "Proceedings of the AAAI Conference on Artificial Intelligence". 5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. (2022) "TempoQR: Temporal Question Reasoning over Knowledge Graphs", Proceedings of the AAAI Conference on Artificial Intelligence, p.5825-5833

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis, "TempoQR: Temporal Question Reasoning over Knowledge Graphs", AAAI, p.5825-5833, 2022.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. "TempoQR: Temporal Question Reasoning over Knowledge Graphs". Proceedings of the AAAI Conference on Artificial Intelligence, 2022, p.5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. "TempoQR: Temporal Question Reasoning over Knowledge Graphs". Proceedings of the AAAI Conference on Artificial Intelligence, (2022): 5825-5833.

Costas Mavromatis||Prasanna Lakkur Subramanyam||Vassilis N. Ioannidis||Adesoji Adeshina||Phillip R Howard||Tetiana Grinberg||Nagib Hakim||George Karypis. TempoQR: Temporal Question Reasoning over Knowledge Graphs. AAAI[Internet]. 2022[cited 2023]; 5825-5833.


ISSN: 2374-3468


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