Question: a law that makes an act illegal after the fact is called a(n) law
[{'answer': 'An ex post facto law', 'provenance': [{'wikipedia_id': '298262', 'title': 'Ex post facto law', 'start_paragraph_id': 38, 'start_character': 40, 'end_paragraph_id': 38, 'end_character': 58, 'bleu_score': 0.668740304976422, 'section': 'Section::::"Ex post facto" laws by country.:India.\n'}]}, {'provenance': [{'wikipedia_id': '298262', 'title': 'Ex post facto law', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 632, 'bleu_score': 0.589414101388337, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3310288056155534851}, 'section': 'Section::::Abstract.'}]}]