Please follow the instructions in https://github.com/shtoshni/fast-coref to get data, model and configurations.
Next, run
python main.py experiment=litbank paths.model_dir=../models/joint_best/ model/doc_encoder/transformer=longformer_joint override_encoder=True train=False
An example training command
python -u main.py experiment=litbank model/doc_encoder/transformer=longformer_joint override_encoder=True train=True