Search Results for author: Jackie Chi Kit Cheung

Found 75 papers, 26 papers with code

Leveraging Lexical Resources for Learning Entity Embeddings in Multi-Relational Data

no code implementations ACL 2016 Teng Long, Ryan Lowe, Jackie Chi Kit Cheung, Doina Precup

Recent work in learning vector-space embeddings for multi-relational data has focused on combining relational information derived from knowledge bases with distributional information derived from large text corpora.

Entity Embeddings

Capturing Pragmatic Knowledge in Article Usage Prediction using LSTMs

no code implementations COLING 2016 Jad Kabbara, Yulan Feng, Jackie Chi Kit Cheung

We examine the potential of recurrent neural networks for handling pragmatic inferences involving complex contextual cues for the task of article usage prediction.

Grammatical Error Detection Machine Translation +1

Predicting Success in Goal-Driven Human-Human Dialogues

no code implementations WS 2017 Michael Noseworthy, Jackie Chi Kit Cheung, Joelle Pineau

We then propose a turn-based hierarchical neural network model that can be used to predict success without requiring a structured goal definition.

World Knowledge for Reading Comprehension: Rare Entity Prediction with Hierarchical LSTMs Using External Descriptions

no code implementations EMNLP 2017 Teng Long, Emmanuel Bengio, Ryan Lowe, Jackie Chi Kit Cheung, Doina Precup

Humans interpret texts with respect to some background information, or world knowledge, and we would like to develop automatic reading comprehension systems that can do the same.

Language Modelling Reading Comprehension +1

Resolving Event Coreference with Supervised Representation Learning and Clustering-Oriented Regularization

1 code implementation SEMEVAL 2018 Kian Kenyon-Dean, Jackie Chi Kit Cheung, Doina Precup

This work provides insight and motivating results for a new general approach to solving coreference and clustering problems with representation learning.

Clustering coreference-resolution +2

A Generalized Knowledge Hunting Framework for the Winograd Schema Challenge

no code implementations NAACL 2018 Ali Emami, Adam Trischler, Kaheer Suleman, Jackie Chi Kit Cheung

We introduce an automatic system that performs well on two common-sense reasoning tasks, the Winograd Schema Challenge (WSC) and the Choice of Plausible Alternatives (COPA).

Common Sense Reasoning Coreference Resolution +1

Let's do it ``again'': A First Computational Approach to Detecting Adverbial Presupposition Triggers

no code implementations ACL 2018 Andre Cianflone, Yulan Feng, Jad Kabbara, Jackie Chi Kit Cheung

We introduce the novel task of predicting adverbial presupposition triggers, which is useful for natural language generation tasks such as summarization and dialogue systems.

Language Modelling Text Generation

BanditSum: Extractive Summarization as a Contextual Bandit

1 code implementation EMNLP 2018 Yue Dong, Yikang Shen, Eric Crawford, Herke van Hoof, Jackie Chi Kit Cheung

In this work, we propose a novel method for training neural networks to perform single-document extractive summarization without heuristically-generated extractive labels.

Extractive Summarization Extractive Text Summarization

A Hierarchical Neural Attention-based Text Classifier

1 code implementation EMNLP 2018 Koustuv Sinha, Yue Dong, Jackie Chi Kit Cheung, Derek Ruths

Deep neural networks have been displaying superior performance over traditional supervised classifiers in text classification.

General Classification text-classification +1

A Knowledge Hunting Framework for Common Sense Reasoning

no code implementations EMNLP 2018 Ali Emami, Noelia De La Cruz, Adam Trischler, Kaheer Suleman, Jackie Chi Kit Cheung

We introduce an automatic system that achieves state-of-the-art results on the Winograd Schema Challenge (WSC), a common sense reasoning task that requires diverse, complex forms of inference and knowledge.

Common Sense Reasoning Coreference Resolution

The Knowref Coreference Corpus: Removing Gender and Number Cues for Difficult Pronominal Anaphora Resolution

1 code implementation ACL 2019 Ali Emami, Paul Trichelair, Adam Trischler, Kaheer Suleman, Hannes Schulz, Jackie Chi Kit Cheung

To explain this performance gap, we show empirically that state-of-the art models often fail to capture context, instead relying on the gender or number of candidate antecedents to make a decision.

Common Sense Reasoning coreference-resolution +2

Contextualized Non-local Neural Networks for Sequence Learning

no code implementations21 Nov 2018 Pengfei Liu, Shuaichen Chang, Xuanjing Huang, Jian Tang, Jackie Chi Kit Cheung

Recently, a large number of neural mechanisms and models have been proposed for sequence learning, of which self-attention, as exemplified by the Transformer model, and graph neural networks (GNNs) have attracted much attention.

General Classification Sentence +2

Multi-task Learning over Graph Structures

no code implementations26 Nov 2018 Pengfei Liu, Jie Fu, Yue Dong, Xipeng Qiu, Jackie Chi Kit Cheung

We present two architectures for multi-task learning with neural sequence models.

General Classification Multi-Task Learning +2

Clustering-Oriented Representation Learning with Attractive-Repulsive Loss

1 code implementation18 Dec 2018 Kian Kenyon-Dean, Andre Cianflone, Lucas Page-Caccia, Guillaume Rabusseau, Jackie Chi Kit Cheung, Doina Precup

The standard loss function used to train neural network classifiers, categorical cross-entropy (CCE), seeks to maximize accuracy on the training data; building useful representations is not a necessary byproduct of this objective.

Clustering General Classification +1

On Variational Learning of Controllable Representations for Text without Supervision

1 code implementation ICML 2020 Peng Xu, Jackie Chi Kit Cheung, Yanshuai Cao

The variational autoencoder (VAE) can learn the manifold of natural images on certain datasets, as evidenced by meaningful interpolating or extrapolating in the continuous latent space.

Style Transfer Text Style Transfer

Understanding the Behaviour of Neural Abstractive Summarizers using Contrastive Examples

no code implementations NAACL 2019 Krtin Kumar, Jackie Chi Kit Cheung

Neural abstractive summarizers generate summary texts using a language model conditioned on the input source text, and have recently achieved high ROUGE scores on benchmark summarization datasets.

Language Modelling

EditNTS: An Neural Programmer-Interpreter Model for Sentence Simplification through Explicit Editing

1 code implementation ACL 2019 Yue Dong, Zichao Li, Mehdi Rezagholizadeh, Jackie Chi Kit Cheung

We present the first sentence simplification model that learns explicit edit operations (ADD, DELETE, and KEEP) via a neural programmer-interpreter approach.

Machine Translation Sentence +2

On Posterior Collapse and Encoder Feature Dispersion in Sequence VAEs

no code implementations10 Nov 2019 Teng Long, Yanshuai Cao, Jackie Chi Kit Cheung

Variational autoencoders (VAEs) hold great potential for modelling text, as they could in theory separate high-level semantic and syntactic properties from local regularities of natural language.

Language Modelling

Can a Gorilla Ride a Camel? Learning Semantic Plausibility from Text

no code implementations WS 2019 Ian Porada, Kaheer Suleman, Jackie Chi Kit Cheung

Previous work has focused specifically on modeling physical plausibility and shown that distributional methods fail when tested in a supervised setting.

Natural Language Understanding

Deconstructing and reconstructing word embedding algorithms

no code implementations29 Nov 2019 Edward Newell, Kian Kenyon-Dean, Jackie Chi Kit Cheung

Uncontextualized word embeddings are reliable feature representations of words used to obtain high quality results for various NLP applications.

Word Embeddings

Multi-Fact Correction in Abstractive Text Summarization

no code implementations EMNLP 2020 Yue Dong, Shuohang Wang, Zhe Gan, Yu Cheng, Jackie Chi Kit Cheung, Jingjing Liu

Pre-trained neural abstractive summarization systems have dominated extractive strategies on news summarization performance, at least in terms of ROUGE.

Abstractive Text Summarization News Summarization +1

TeMP: Temporal Message Passing for Temporal Knowledge Graph Completion

1 code implementation EMNLP 2020 Jiapeng Wu, Meng Cao, Jackie Chi Kit Cheung, William L. Hamilton

Our analysis also reveals important sources of variability both within and across TKG datasets, and we introduce several simple but strong baselines that outperform the prior state of the art in certain settings.

Imputation Temporal Knowledge Graph Completion

Factual Error Correction for Abstractive Summarization Models

1 code implementation EMNLP 2020 Meng Cao, Yue Dong, Jiapeng Wu, Jackie Chi Kit Cheung

Experimental results show that our model is able to correct factual errors in summaries generated by other neural summarization models and outperforms previous models on factual consistency evaluation on the CNN/DailyMail dataset.

Abstractive Text Summarization

Learning Efficient Task-Specific Meta-Embeddings with Word Prisms

1 code implementation COLING 2020 Jingyi He, KC Tsiolis, Kian Kenyon-Dean, Jackie Chi Kit Cheung

Word embeddings are trained to predict word cooccurrence statistics, which leads them to possess different lexical properties (syntactic, semantic, etc.)

Word Embeddings

An Analysis of Dataset Overlap on Winograd-Style Tasks

no code implementations COLING 2020 Ali Emami, Adam Trischler, Kaheer Suleman, Jackie Chi Kit Cheung

The Winograd Schema Challenge (WSC) and variants inspired by it have become important benchmarks for common-sense reasoning (CSR).

Common Sense Reasoning

Deconstructing word embedding algorithms

no code implementations EMNLP 2020 Kian Kenyon-Dean, Edward Newell, Jackie Chi Kit Cheung

Word embeddings are reliable feature representations of words used to obtain high quality results for various NLP applications.

Word Embeddings

On the Systematicity of Probing Contextualized Word Representations: The Case of Hypernymy in BERT

1 code implementation Joint Conference on Lexical and Computational Semantics 2020 Abhilasha Ravichander, Eduard Hovy, Kaheer Suleman, Adam Trischler, Jackie Chi Kit Cheung

In particular, we demonstrate through a simple consistency probe that the ability to correctly retrieve hypernyms in cloze tasks, as used in prior work, does not correspond to systematic knowledge in BERT.

Optimizing Deeper Transformers on Small Datasets

1 code implementation ACL 2021 Peng Xu, Dhruv Kumar, Wei Yang, Wenjie Zi, Keyi Tang, Chenyang Huang, Jackie Chi Kit Cheung, Simon J. D. Prince, Yanshuai Cao

This work shows that this does not always need to be the case: with proper initialization and optimization, the benefits of very deep transformers can carry over to challenging tasks with small datasets, including Text-to-SQL semantic parsing and logical reading comprehension.

Reading Comprehension Semantic Parsing +2

On-the-Fly Attention Modulation for Neural Generation

no code implementations Findings (ACL) 2021 Yue Dong, Chandra Bhagavatula, Ximing Lu, Jena D. Hwang, Antoine Bosselut, Jackie Chi Kit Cheung, Yejin Choi

Despite considerable advancements with deep neural language models (LMs), neural text generation still suffers from degeneration: the generated text is repetitive, generic, self-contradictory, and often lacks commonsense.

Language Modelling Sentence +1

The Topic Confusion Task: A Novel Scenario for Authorship Attribution

no code implementations17 Apr 2021 Malik H. Altakrori, Jackie Chi Kit Cheung, Benjamin C. M. Fung

Authorship attribution is the problem of identifying the most plausible author of an anonymous text from a set of candidate authors.

Authorship Attribution

Characterizing Idioms: Conventionality and Contingency

no code implementations ACL 2022 Michaela Socolof, Jackie Chi Kit Cheung, Michael Wagner, Timothy J. O'Donnell

Second, the non-canonical meanings of words in an idiom are contingent on the presence of other words in the idiom.

TIE: A Framework for Embedding-based Incremental Temporal Knowledge Graph Completion

1 code implementation17 Apr 2021 Jiapeng Wu, Yishi Xu, Yingxue Zhang, Chen Ma, Mark Coates, Jackie Chi Kit Cheung

The model has to adapt to changes in the TKG for efficient training and inference while preserving its performance on historical knowledge.

Decision Making Information Retrieval +4

Modeling Event Plausibility with Consistent Conceptual Abstraction

1 code implementation NAACL 2021 Ian Porada, Kaheer Suleman, Adam Trischler, Jackie Chi Kit Cheung

Understanding natural language requires common sense, one aspect of which is the ability to discern the plausibility of events.

Common Sense Reasoning

Hallucinated but Factual! Inspecting the Factuality of Hallucinations in Abstractive Summarization

1 code implementation ACL 2022 Meng Cao, Yue Dong, Jackie Chi Kit Cheung

State-of-the-art abstractive summarization systems often generate \emph{hallucinations}; i. e., content that is not directly inferable from the source text.

Abstractive Text Summarization Reinforcement Learning (RL) +1

Does Pre-training Induce Systematic Inference? How Masked Language Models Acquire Commonsense Knowledge

no code implementations NAACL 2022 Ian Porada, Alessandro Sordoni, Jackie Chi Kit Cheung

Transformer models pre-trained with a masked-language-modeling objective (e. g., BERT) encode commonsense knowledge as evidenced by behavioral probes; however, the extent to which this knowledge is acquired by systematic inference over the semantics of the pre-training corpora is an open question.

Language Modelling Masked Language Modeling +1

MaskEval: Weighted MLM-Based Evaluation for Text Summarization and Simplification

no code implementations24 May 2022 Yu Lu Liu, Rachel Bawden, Thomas Scialom, Benoît Sagot, Jackie Chi Kit Cheung

In text summarization and simplification, system outputs must be evaluated along multiple dimensions such as relevance, factual consistency, fluency, and grammaticality, and a wide range of possible outputs could be of high quality.

Language Modelling Masked Language Modeling +2

Learning with Rejection for Abstractive Text Summarization

1 code implementation16 Feb 2023 Meng Cao, Yue Dong, Jingyi He, Jackie Chi Kit Cheung

State-of-the-art abstractive summarization systems frequently hallucinate content that is not supported by the source document, mainly due to noise in the training dataset.

Abstractive Text Summarization

Systematic Rectification of Language Models via Dead-end Analysis

1 code implementation27 Feb 2023 Meng Cao, Mehdi Fatemi, Jackie Chi Kit Cheung, Samira Shabanian

Other methods rely on rule-based or prompt-based token elimination, which are limited as they dismiss future tokens and the overall meaning of the complete discourse.

Reinforcement Learning (RL)

Investigating Failures to Generalize for Coreference Resolution Models

no code implementations16 Mar 2023 Ian Porada, Alexandra Olteanu, Kaheer Suleman, Adam Trischler, Jackie Chi Kit Cheung

We investigate the extent to which errors of current coreference resolution models are associated with existing differences in operationalization across datasets (OntoNotes, PreCo, and Winogrande).

coreference-resolution

Successor Features for Efficient Multisubject Controlled Text Generation

no code implementations3 Nov 2023 Meng Cao, Mehdi Fatemi, Jackie Chi Kit Cheung, Samira Shabanian

While large language models (LLMs) have achieved impressive performance in generating fluent and realistic text, controlling the generated text so that it exhibits properties such as safety, factuality, and non-toxicity remains challenging.

Computational Efficiency Language Modelling +1

Responsible AI Considerations in Text Summarization Research: A Review of Current Practices

no code implementations18 Nov 2023 Yu Lu Liu, Meng Cao, Su Lin Blodgett, Jackie Chi Kit Cheung, Alexandra Olteanu, Adam Trischler

We focus on how, which, and when responsible AI issues are covered, which relevant stakeholders are considered, and mismatches between stated and realized research goals.

Text Summarization

Mechanisms of non-factual hallucinations in language models

1 code implementation27 Mar 2024 Lei Yu, Meng Cao, Jackie Chi Kit Cheung, Yue Dong

Our study investigates the mechanistic causes of hallucination, specifically non-factual ones where the LM incorrectly predicts object attributes in response to subject-relation queries.

Attribute Hallucination +2

A Controlled Reevaluation of Coreference Resolution Models

1 code implementation31 Mar 2024 Ian Porada, Xiyuan Zou, Jackie Chi Kit Cheung

When controlling for language model size, encoder-based CR models outperform more recent decoder-based models in terms of both accuracy and inference speed.

coreference-resolution Language Modelling

Textual Time Travel: A Temporally Informed Approach to Theory of Mind

no code implementations Findings (EMNLP) 2021 Akshatha Arodi, Jackie Chi Kit Cheung

This capability, called theory of mind (ToM), is crucial, as it allows a model to predict and interpret the needs of users based on their mental states.

Question Answering

Post-Editing Extractive Summaries by Definiteness Prediction

no code implementations Findings (EMNLP) 2021 Jad Kabbara, Jackie Chi Kit Cheung

Moreover, based on an automatic evaluation study, we provide evidence for our system’s ability to generate linguistic decisions that lead to improved extractive summaries.

Extractive Summarization

Investigating the Performance of Transformer-Based NLI Models on Presuppositional Inferences

no code implementations COLING 2022 Jad Kabbara, Jackie Chi Kit Cheung

Presuppositions are assumptions that are taken for granted by an utterance, and identifying them is key to a pragmatic interpretation of language.

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