Arsha Nagrani


2024

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VIEWS: Entity-Aware News Video Captioning
Hammad Ayyubi | Tianqi Liu | Arsha Nagrani | Xudong Lin | Mingda Zhang | Anurag Arnab | Feng Han | Yukun Zhu | Xuande Feng | Kevin Zhang | Jialu Liu | Shih-Fu Chang
Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing

Existing popular video captioning benchmarks and models often produce generic captions for videos that lack specific identification of individuals, locations, or organizations (named entities). However, in the case of news videos, the setting is more demanding, requiring the inclusion of such named entities for meaningful summarization. Therefore, we introduce the task of directly summarizing news videos into captions that are entity-aware. To facilitate research in this area, we have collected a large-scale dataset named VIEWS (VIdeo NEWS). Within this task, we face challenges inherent to recognizing named entities and navigating diverse, dynamic contexts, all while relying solely on visual cues. To address these challenges, we propose a model-agnostic approach that enriches visual information extracted from videos with context sourced from external knowledge, enabling the generation of entity-aware captions. We validate the effectiveness of our approach across three video captioning models. Additionally, we conduct a critical analysis of our methodology to gain insights into the complexity of the task, the challenges it presents, and potential avenues for future research.

2023

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Modular Visual Question Answering via Code Generation
Sanjay Subramanian | Medhini Narasimhan | Kushal Khangaonkar | Kevin Yang | Arsha Nagrani | Cordelia Schmid | Andy Zeng | Trevor Darrell | Dan Klein
Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)

We present a framework that formulates visual question answering as modular code generation. In contrast to prior work on modular approaches to VQA, our approach requires no additional training and relies on pre-trained language models (LMs), visual models pre-trained on image-caption pairs, and fifty VQA examples used for in-context learning. The generated Python programs invoke and compose the outputs of the visual models using arithmetic and conditional logic. Our approach improves accuracy on the COVR dataset by at least 3% and on the GQA dataset by 2% compared to the few-shot baseline that does not employ code generation.

2021

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Recognizing Multimodal Entailment
Cesar Ilharco | Afsaneh Shirazi | Arjun Gopalan | Arsha Nagrani | Blaz Bratanic | Chris Bregler | Christina Funk | Felipe Ferreira | Gabriel Barcik | Gabriel Ilharco | Georg Osang | Jannis Bulian | Jared Frank | Lucas Smaira | Qin Cao | Ricardo Marino | Roma Patel | Thomas Leung | Vaiva Imbrasaite
Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing: Tutorial Abstracts

How information is created, shared and consumed has changed rapidly in recent decades, in part thanks to new social platforms and technologies on the web. With ever-larger amounts of unstructured and limited labels, organizing and reconciling information from different sources and modalities is a central challenge in machine learning. This cutting-edge tutorial aims to introduce the multimodal entailment task, which can be useful for detecting semantic alignments when a single modality alone does not suffice for a whole content understanding. Starting with a brief overview of natural language processing, computer vision, structured data and neural graph learning, we lay the foundations for the multimodal sections to follow. We then discuss recent multimodal learning literature covering visual, audio and language streams, and explore case studies focusing on tasks which require fine-grained understanding of visual and linguistic semantics question answering, veracity and hatred classification. Finally, we introduce a new dataset for recognizing multimodal entailment, exploring it in a hands-on collaborative section. Overall, this tutorial gives an overview of multimodal learning, introduces a multimodal entailment dataset, and encourages future research in the topic.