KILM: Knowledge Injection into Encoder-Decoder Language Models

• URL: http://arxiv.org/abs/2302.09170v1
• Date: Fri, 17 Feb 2023 22:48:07 GMT
• Title: KILM: Knowledge Injection into Encoder-Decoder Language Models
• Authors: Yan Xu, Mahdi Namazifar, Devamanyu Hazarika, Aishwarya Padmakumar, Yang Liu, Dilek Hakkani-T\"ur
• Abstract summary: Large pre-trained language models (PLMs) have been shown to retain implicit knowledge within their parameters. We propose Knowledge Injection into Language Models (KILM), a novel approach that injects entity-related knowledge into encoder-decoder PLMs. KILM enables models to retain more knowledge and hallucinate less, while preserving their original performance on general NLU and NLG tasks.
• Score: 26.44077668498835
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large pre-trained language models (PLMs) have been shown to retain implicit knowledge within their parameters. To enhance this implicit knowledge, we propose Knowledge Injection into Language Models (KILM), a novel approach that injects entity-related knowledge into encoder-decoder PLMs, via a generative knowledge infilling objective through continued pre-training. This is done without architectural modifications to the PLMs or adding additional parameters. Experimental results over a suite of knowledge-intensive tasks spanning numerous datasets show that KILM enables models to retain more knowledge and hallucinate less, while preserving their original performance on general NLU and NLG tasks. KILM also demonstrates improved zero-shot performances on tasks such as entity disambiguation, outperforming state-of-the-art models having 30x more parameters.

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