_   _                 _ _        ____      _        _                 _ 
 | \ | | ___   ___   __| | | ___  |  _ \ ___| |_ _ __(_) _____   ____ _| |
 |  \| |/ _ \ / _ \ / _` | |/ _ \ | |_) / _ \ __| '__| |/ _ \ \ / / _` | |
 | |\  | (_) | (_) | (_| | |  __/ |  _ <  __/ |_| |  | |  __/\ V / (_| | |
 |_| \_|\___/ \___/ \__,_|_|\___| |_| \_\___|\__|_|  |_|\___| \_/ \__,_|_|

neural reranking & extractive question answering with:

- k-nrm
  - end-to-end neural ad-hoc ranking with kernel pooling
  - by xiong et al., 2017: https://www.cs.cmu.edu/~zhuyund/papers/end-end-neural.pdf
- tk
  - transformer-kernel ranking
  - by mitra et al., 2020: https://arxiv.org/pdf/2104.09393.pdf
  - based on "matchmaker" by hofstätter et al.: https://github.com/sebastian-hofstaetter/matchmaker

run `make help` to see the available target environments to run the code.