Dominican Republic

This paper describes the Fujitsu DMATH systems used for WMT 2021
News Translation and Biomedical Translation tasks.
We focused on low-resource pairs, using a simple system.
We conducted experiments on English-Hausa, Xhosa-Zulu and English-Basque,
and submitted the results for
Xhosa→Zulu
in the News Translation Task, and
English→Basque
in the Biomedical Translation Task,
abstract and terminology translation subtasks.
Our system combines BPE dropout, sub-subword features and back-translation
with a Transformer (base) model, achieving good results on the evaluation sets.

EMNLP 2021

The Fujitsu DMATH submissions for WMT21 News Translation and Biomedical Translation Tasks

EMNLP 2021 is planned to be a hybrid event in Punta Cana, Dominican Republic, with both on-site and fully virtual participation possible. The experience for on-site participants would closely approximate a normal pre-COVID *ACL conference, with 5-6 thematically organized parallel sessions and live Q/A and interactive discussion immediately after the talks. Presentations by virtual participants will be equitably interleaved with those of on-site participants, projected on the auditorium screens as if on-site, and also followed immediately by live Q/A and interactive discussion at a time during reasonable waking hours for the virtual presenter. For all participants, on-site and virtual, who are unable to attend a session due to either time-zone issues or because they are participating in another session live, talk recordings and slides will be available online at a minimum after the live presentation (and in many cases before as well), and questions may be submitted in advance on session-specific discussion boards and answered live in session with the usual visual aids if desired.

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EMNLP 2021 is planned to be a hybrid event in Punta Cana, Dominican Republic, with both on-site and fully virtual participation possible.

workshop paper

Temporal language grounding in videos aims to localize the temporal span relevant to the given query sentence. Previous methods treat it either as a boundary regression task or a span extraction task. This paper will formulate temporal language grounding into video reading comprehension and propose a Relation-aware Network (RaNet) to address it. This framework aims to select a video moment choice from the predefined answer set with the aid of coarse-and-fine choice-query interaction and choice-choice relation construction. A choice-query interactor is proposed to match the visual and textual information simultaneously in sentence-moment and token-moment levels, leading to a coarse-and-fine cross-modal interaction. Moreover, a novel multi-choice relation constructor is introduced by leveraging graph convolution to capture the dependencies among video moment choices for the best choice selection. Extensive experiments on ActivityNet-Captions, TACoS, and Charades-STA demonstrate the effectiveness of our solution. Codes will be available at https://github.com/Huntersxsx/RaNet.

Relation-aware Video Reading Comprehension for Temporal Language Grounding

A currently popular research area in end-to-end speech translation is the use of knowledge distillation from a machine translation~(MT) task to improve the speech translation~(ST) task. However, such scenario obviously allows only a one way transfer, limiting the overall effectiveness of the approach by the performance of the pre-trained teacher model. Therefore, we pose that in this respect knowledge distillation-based approaches are sub-optimal. We propose an alternative---a trainable mutual-learning scenario, where the MT and ST models are collaboratively trained and are considered as peers, rather than teacher/student. This allows us to improve the performance of end-to-end ST more effectively than with a teacher-student paradigm. As a side benefit, performance of the MT model also improves.

Mutual-Learning Improves End-to-End Speech Translation

Visual Dialog is assumed to require the dialog history to generate correct responses during a dialog. However, it is not clear from previous work how dialog history is needed for visual dialog. In this paper we define what it means for visual questions to require dialog history and we propose a methodology for identifying them. We release a subset of the Guesswhat?! questions for which their dialog history completely changes their responses. We propose a novel interpretable representation that visually grounds dialog history: the Region under Discussion. It constrains the image's spatial features according to a semantic representation of the history inspired by the information structure notion of Question under Discussion. We evaluate the architecture on task-specific multimodal models and the visual transformer model LXMERT and show that there is still room for improvement.

Region under Discussion for visual dialog

Multimodal abstractive summarization (MAS) aims to take advantage of data from multiple modalities and provides a short, concise and readable textual summary to let users quickly acquire their essential information. Recently, large-scale generative pre-trained language models (GPLMs) have shown remarkable performance on abstractive text summarization. However, leveraging and adapting GPLMs to MAS is still an unexplored research direction. Our contributions in this work are threefold: 1. To the best of our knowledge, we are the first to inject visual information into text-only GPLMs, and to use it for the MAS task. 2. We systematically study two research questions: 1) how to inject visual information into GPLMs without hurting their generation ability; and 2) where is the optimal place in GPLMs to inject the visual information? 3. Our model significantly outperforms the state-of-the-art model on the How2 dataset, and the injected visual guidance contributes 83.6% of the overall improvement.

Vision Guided Generative Pre-trained Language Models for Multimodal Abstractive Summarization

We present a grounded neural dialogue model that successfully collaborates with people in a partially-observable reference game. We focus on a setting where two agents each observe an overlapping part of a world context and need to identify and agree on some object they share. Therefore, the agents should pool their information and communicate pragmatically to solve the task. Our dialogue agent accurately grounds referents from the partner's utterances using a structured reference resolver, conditions on these referents using a recurrent memory, and uses a pragmatic generation procedure to ensure the partner can resolve the references the agent produces. We evaluate on the OneCommon spatial grounding dialogue task (Udagawa and Aizawa 2019), involving a number of dots arranged on a board with continuously varying positions, sizes, and shades. Our agent substantially outperforms the previous state of the art for the task, obtaining a 20% relative improvement in successful task completion in self-play evaluations and a 50% relative improvement in success in human evaluations.

Reference-Centric Models for Grounded Collaborative Dialogue

This paper describes the PROMT submissions for the WMT21 Terminology Translation Task. We participate in two directions: English to French and English to Russian. Our final submissions are MarianNMT-based neural systems. We present two technologies for terminology translation: a modification of the Dinu et al. (2019) soft-constrained approach and our own approach called PROMT Smart Neural Dictionary (SmartND). We achieve good results in both directions.

PROMT Systems for WMT21 Terminology Translation Task

This paper describes NiuTrans neural machine translation systems of the WMT 2021 news translation tasks. We made submissions to 9 language directions, including English2{Chinese, Japanese, Russian, Icelandic} and English2Hausa tasks. Our primary systems are built on several effective variants of Transformer, e.g., Transformer-DLCL, ODE-Transformer. We also utilize back-translation, knowledge distillation, post-ensemble, and iterative fine-tuning techniques to enhance the model performance further.

The NiuTrans Machine Translation Systems for WMT21

In this work, we investigate methods for the challenging task of translating between low- resource language pairs that exhibit some level of similarity. In particular, we consider the utility of transfer learning for translating between several Indo-European low-resource languages from the Germanic and Romance language families. In particular, we build two main classes of transfer-based systems to study how relatedness can benefit the translation performance. The primary system fine-tunes a model pre-trained on a related language pair and the contrastive system fine-tunes one pre-trained on an unrelated language pair. Our experiments show that although relatedness is not necessary for transfer learning to work, it does benefit model performance.

Machine Translation of Low-Resource Indo-European Languages

We investigate transfer learning based on pre-trained neural machine translation models to translate between (low-resource) similar languages. This work is part of our contribution to the WMT 2021 Similar Languages Translation Shared Task where we submitted models for different language pairs, including French-Bambara, Spanish-Catalan, and Spanish-Portuguese in both directions. Our models for Catalan-Spanish (82.79 BLEU)and Portuguese-Spanish (87.11 BLEU) rank top 1 in the official shared task evaluation, and we are the only team to submit models for the French-Bambara pairs.

Improving Similar Language Translation With Transfer Learning

This paper describes our work in the WMT 2021 Machine Translation using Terminologies shared Task. We participate in the shared translation terminologies task in English to Chinese language pair. To satisfy terminology constraints on translation, we use a terminology data augmentation strategy based on Transformer model. We used tags to mark and add the term translations into the matched sentences. In the training procedure, we created synthetic term data by filtering a phrase table. Detailed pre-processing and filtering on data, in-domain finetuning and ensemble method are also used in our system. Our submission obtains competitive results in the terminology-targeted evaluation.

Next from EMNLP 2021

Relation-aware Video Reading Comprehension for Temporal Language Grounding

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