in src/substitution_fns.py [0:0]
def group_answers_by_answer_type(dset: QADataset):
"""Reorganizes a QADataset into a mapping from answer type to member answers."""
group_to_answer_sets = defaultdict(dict)
for ex in dset.examples:
for answer in ex.gold_answers:
if answer.answer_type:
group_to_answer_sets[answer.answer_type][answer.text] = answer
return group_to_answer_sets