Coey

I am following this notebook (https://colab.research.google.com/github/terrierteam/pyterrier_deepct/blob/main/pyterrier_deepct_vaswani.ipynb ) to train deepct model while I got the following error when I run the last cell: ``` pt.Experiment([ pt.BatchRetrieve(pt.get_dataset("vaswani").get_index(), wmodel="BM25"), pt.BatchRetrieve(indexref, wmodel="BM25"), ],...