DepWiGNN: A Depth-wise Graph Neural Network for Multi-hop Spatial Reasoning in Text

• URL: http://arxiv.org/abs/2310.12557v2
• Date: Fri, 8 Mar 2024 14:16:55 GMT
• Title: DepWiGNN: A Depth-wise Graph Neural Network for Multi-hop Spatial Reasoning in Text
• Authors: Shuaiyi Li, Yang Deng, Wai Lam
• Abstract summary: We propose a novel Depth-Wise Graph Neural Network (DepWiGNN) to handle multi-hop spatial reasoning. Specifically, we design a novel node memory scheme and aggregate the information over the depth dimension instead of the breadth dimension of the graph. Experimental results on two challenging multi-hop spatial reasoning datasets show that DepWiGNN outperforms existing spatial reasoning methods.
• Score: 52.699307699505646
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spatial reasoning in text plays a crucial role in various real-world applications. Existing approaches for spatial reasoning typically infer spatial relations from pure text, which overlooks the gap between natural language and symbolic structures. Graph neural networks (GNNs) have showcased exceptional proficiency in inducing and aggregating symbolic structures. However, classical GNNs face challenges in handling multi-hop spatial reasoning due to the over-smoothing issue, i.e., the performance decreases substantially as the number of graph layers increases. To cope with these challenges, we propose a novel Depth-Wise Graph Neural Network (DepWiGNN). Specifically, we design a novel node memory scheme and aggregate the information over the depth dimension instead of the breadth dimension of the graph, which empowers the ability to collect long dependencies without stacking multiple layers. Experimental results on two challenging multi-hop spatial reasoning datasets show that DepWiGNN outperforms existing spatial reasoning methods. The comparisons with the other three GNNs further demonstrate its superiority in capturing long dependency in the graph.

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