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Walter Chang

6 accepted papers

2022

Multimodal Intent Discovery from Livestream Videos

NAACL 2022findings

Individuals, educational institutions, and businesses are prolific at generating instructional video content such as “how-to” and tutorial guides. While significant progress has been made in basic video understanding tasks, identifying procedural intent within these instructional videos is a challen…

2021

A Context-Dependent Gated Module for Incorporating Symbolic Semantics into Event Coreference Resolution

NAACL 2021long

Event coreference resolution is an important research problem with many applications. Despite the recent remarkable success of pre-trained language models, we argue that it is still highly beneficial to utilize symbolic features for the task. However, as the input for coreference resolution typicall…

2021

A Gradually Soft Multi-Task and Data-Augmented Approach to Medical Question Understanding

ACL 2021long

Users of medical question answering systems often submit long and detailed questions, making it hard to achieve high recall in answer retrieval. To alleviate this problem, we propose a novel Multi-Task Learning (MTL) method with data augmentation for medical question understanding. We first establis…

2021

Few-Shot Intent Detection via Contrastive Pre-Training and Fine-Tuning

EMNLP 2021main

In this work, we focus on a more challenging few-shot intent detection scenario where many intents are fine-grained and semantically similar. We present a simple yet effective few-shot intent detection schema via contrastive pre-training and fine-tuning. Specifically, we first conduct self-supervise…

2021

StreamHover: Livestream Transcript Summarization and Annotation

EMNLP 2021main

With the explosive growth of livestream broadcasting, there is an urgent need for new summarization technology that enables us to create a preview of streamed content and tap into this wealth of knowledge. However, the problem is nontrivial due to the informal nature of spoken language. Further, the…