readme: ---
  license: apache-2.0
  ---
  
  # Model Description
  
  This is a retriever model based on ColBERT v2 with [xlm-roberta-large](https://huggingface.co/xlm-roberta-large) language model.<br>
  This model was trained with the OpenNQ data.<br>
  The architecture of the model and hyper parameters are described in the paper ‘Relevance-guided Supervision for OpenQA with ColBERT’.
  
  ## Intended uses & limitations
  
  This model uses the xlm-roberta-large LM. Biases associated with the pre-trained language model we used may be present in this ColBERT v2 model.
  
  ## Usage 
  This model can be used with [PrimeQA](https://github.com/primeqa/primeqa)’s [ColBERT](https://github.com/primeqa/primeqa/blob/main/primeqa/ir/README.md) engine.
  
  ## BibTeX entry and citation info
  ```bibtex
  @article{Khattab2021RelevanceguidedSF,
    title={Relevance-guided Supervision for OpenQA with ColBERT},
    author={O. Khattab and Christopher Potts and Matei A. Zaharia},
    journal={Transactions of the Association for Computational Linguistics},
    year={2021},
  }
  ```
  
  ```bibtex
  @article{Lee2019LatentRF,
    title={Latent Retrieval for Weakly Supervised Open Domain Question Answering},
    author={Kenton Lee and Ming-Wei Chang and Kristina Toutanova},
    journal={ACL},
    year={2019}
  }
  ```