The Relation Extraction (RE) task aims to extract the relation between two entities in a sentence. As the performance of methods on RE task depends on datasets’ quantity and quality, in this paper, we propose to use the Large Language Model (LLM) to do data augmentation. Moreover, compared to traditional fine-tuning methods, more research focuses on prompt learning. However, all of their prompt templates ignore the relative order of entities, which we believe will affect the prediction error. Due to that, we propose novel bidirectional prompt templates for prompt learning and design a training strategy for utilizing the templates. Then we try to fit the probability distributions of both prompt learning and fine-tuning methods into our model. To this end, we propose Relation Classification via Bidirectional Prompt learning with data augmentation by LLM (RCBP) and conduct experiments on four datasets: TACRED, RETACRED, TACREV and Semeval. The results show that RCBP performs well on these datasets and outperforms the state-of-the-art in the TACREV, RETACRED datasets.

With the advances in deep learning, tremendous progress has been made with chit-chat dialogue systems and task-oriented dialogue systems. However, these two systems are often tackled separately in current methods. To achieve more natural interaction with humans, dialogue systems need to be capable of both chatting and accomplishing tasks. To this end, we propose a unified dialogue system (UniDS) with the two aforementioned skills. In particular, we design a unified dialogue data schema, compatible for both chit-chat and task-oriented dialogues. Besides, we propose a two-stage training method to train UniDS based on the unified dialogue data schema. UniDS does not need to adding extra parameters to existing chit-chat dialogue systems. Experimental results demonstrate that the proposed UniDS works comparably well as the state-of-the-art chit-chat dialogue systems and task-oriented dialogue systems. More importantly, UniDS achieves better robustness than pure dialogue systems and satisfactory switch ability between two types of dialogues.