Question: where did the term trick or treat come from
[{'answer': 'Blackie , Alberta', 'provenance': [{'wikipedia_id': '30861', 'title': 'Trick-or-treating', 'start_paragraph_id': 14, 'start_character': 83, 'end_paragraph_id': 14, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::History.:Origins.\n'}]}, {'provenance': [{'wikipedia_id': '30861', 'title': 'Trick-or-treating', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 99, 'bleu_score': 0.8914703664390791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4862080391332191907}, 'section': 'Section::::History.:Origins.\n'}]}]