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Added citation, github repo and paper link to model card.

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  license: apache-2.0
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+ tags:
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+ - information retrieval
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+ - reranking
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  license: apache-2.0
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  ---
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+
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+ # Model Card for NQ Question Encoder in Re2G
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+
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+ # Model Details
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+
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+ > The approach of RAG, Multi-DPR, and KGI is to train a neural IR (Information Retrieval) component and further train it end-to-end through its impact in generating the correct output.
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+
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+ <img src="https://github.com/IBM/kgi-slot-filling/raw/re2g/model_cards/Re2G_Arch2.png" width="100%">
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+
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+ ## Training, Evaluation and Inference
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+ The code for training, evaluation and inference is in our github in the [re2g branch](https://github.com/IBM/kgi-slot-filling/tree/re2g).
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+
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+ ## Usage
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+
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+ The best way to use the model is by adapting the [dpr_apply.py](https://github.com/IBM/kgi-slot-filling/blob/re2g/dpr/dpr_apply.py)
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+
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+ ## Citation
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+ ```
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+ @inproceedings{glass-etal-2022-re2g,
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+ title = "{R}e2{G}: Retrieve, Rerank, Generate",
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+ author = "Glass, Michael and
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+ Rossiello, Gaetano and
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+ Chowdhury, Md Faisal Mahbub and
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+ Naik, Ankita and
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+ Cai, Pengshan and
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+ Gliozzo, Alfio",
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+ booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies",
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+ month = jul,
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+ year = "2022",
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+ address = "Seattle, United States",
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+ publisher = "Association for Computational Linguistics",
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+ url = "https://aclanthology.org/2022.naacl-main.194",
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+ doi = "10.18653/v1/2022.naacl-main.194",
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+ pages = "2701--2715",
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+ abstract = "As demonstrated by GPT-3 and T5, transformers grow in capability as parameter spaces become larger and larger. However, for tasks that require a large amount of knowledge, non-parametric memory allows models to grow dramatically with a sub-linear increase in computational cost and GPU memory requirements. Recent models such as RAG and REALM have introduced retrieval into conditional generation. These models incorporate neural initial retrieval from a corpus of passages. We build on this line of research, proposing Re2G, which combines both neural initial retrieval and reranking into a BART-based sequence-to-sequence generation. Our reranking approach also permits merging retrieval results from sources with incomparable scores, enabling an ensemble of BM25 and neural initial retrieval. To train our system end-to-end, we introduce a novel variation of knowledge distillation to train the initial retrieval, reranker and generation using only ground truth on the target sequence output. We find large gains in four diverse tasks: zero-shot slot filling, question answering, fact checking and dialog, with relative gains of 9{\%} to 34{\%} over the previous state-of-the-art on the KILT leaderboard. We make our code available as open source.",
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+ }
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+ ```
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+
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+ ## Model Description
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+ The model creators note in the [associated paper](https://aclanthology.org/2022.naacl-main.194.pdf):
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+ > As demonstrated by GPT-3 and T5, transformers grow in capability as parameter spaces become larger and larger. However, for tasks that require a large amount of knowledge, non-parametric memory allows models to grow dramatically with a sub-linear increase in computational cost and GPU memory requirements. Recent models such as RAG and REALM have introduced retrieval into conditional generation. These models incorporate neural initial retrieval from a corpus of passages. We build on this line of research, proposing Re2G, which combines both neural initial retrieval and reranking into a BART-based sequence-to-sequence generation. Our reranking approach also permits merging retrieval results from sources with incomparable scores, enabling an ensemble of BM25 and neural initial retrieval. To train our system end-to-end, we introduce a novel variation of knowledge distillation to train the initial retrieval, reranker and generation using only ground truth on the target sequence output. We find large gains in four diverse tasks: zero-shot slot filling, question answering, fact checking and dialog, with relative gains of 9% to 34% over the previous state-of-the-art on the KILT leaderboard. We make our code available as open source.
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+
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+ - **Developed by:** IBM
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+ - **Shared by [Optional]:** IBM
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+
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+ - **Model type:** Query/Passage Reranker
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+ - **Language(s) (NLP):** English
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+ - **License:** Apache 2.0
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+ - **Parent Model:** [dpr-question_encoder-multiset-base](https://huggingface.co/facebook/dpr-question_encoder-multiset-base)
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+ - **Resources for more information:**
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+ - [GitHub Repo](https://github.com/IBM/kgi-slot-filling)
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+ - [Associated Paper](https://aclanthology.org/2022.naacl-main.194.pdf)
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+
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+
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+ # Uses
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+
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+
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+ ## Direct Use
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+ This model can be used for the task of encoding a question to a vector to be used as a query into an Approximate Nearest Neighbors index. It must be used in combination with a context encoder that encodes passages to a vector and indexes them.
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+
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+
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+ # Citation
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+
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+
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+ **BibTeX:**
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+
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+ ```bibtex
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+ @inproceedings{glass-etal-2022-re2g,
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+ title = "{R}e2{G}: Retrieve, Rerank, Generate",
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+ author = "Glass, Michael and
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+ Rossiello, Gaetano and
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+ Chowdhury, Md Faisal Mahbub and
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+ Naik, Ankita and
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+ Cai, Pengshan and
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+ Gliozzo, Alfio",
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+ booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies",
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+ month = jul,
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+ year = "2022",
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+ address = "Seattle, United States",
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+ publisher = "Association for Computational Linguistics",
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+ url = "https://aclanthology.org/2022.naacl-main.194",
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+ doi = "10.18653/v1/2022.naacl-main.194",
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+ pages = "2701--2715",
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+ abstract = "As demonstrated by GPT-3 and T5, transformers grow in capability as parameter spaces become larger and larger. However, for tasks that require a large amount of knowledge, non-parametric memory allows models to grow dramatically with a sub-linear increase in computational cost and GPU memory requirements. Recent models such as RAG and REALM have introduced retrieval into conditional generation. These models incorporate neural initial retrieval from a corpus of passages. We build on this line of research, proposing Re2G, which combines both neural initial retrieval and reranking into a BART-based sequence-to-sequence generation. Our reranking approach also permits merging retrieval results from sources with incomparable scores, enabling an ensemble of BM25 and neural initial retrieval. To train our system end-to-end, we introduce a novel variation of knowledge distillation to train the initial retrieval, reranker and generation using only ground truth on the target sequence output. We find large gains in four diverse tasks: zero-shot slot filling, question answering, fact checking and dialog, with relative gains of 9{\%} to 34{\%} over the previous state-of-the-art on the KILT leaderboard. We make our code available as open source.",
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+ }
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+
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+ ```