Add large-10-epochs and helper to make epochs part of predicted file's name

bart/sparql.ipynb

...d-requeried-linked-test-eval-append-1-large-10-epochs.txt

...-linked-test-pred_responses-append-1-large-10-epochs.json

...ueried-linked-test-predicted-append-1-large-10-epochs.csv

evaluate.ipynb