Question: when did roller derby first appear in the press
[{'answer': '1922', 'provenance': [{'wikipedia_id': '14012790', 'title': 'History of roller derby', 'start_paragraph_id': 7, 'start_character': 88, 'end_paragraph_id': 7, 'end_character': 92, 'bleu_score': 1.0, 'section': 'Section::::Origins.:Endurance races.\n'}]}, {'provenance': [{'wikipedia_id': '14012790', 'title': 'History of roller derby', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 328, 'bleu_score': 0.874260849023038, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3425869985746619726}, 'section': 'Section::::Origins.:Endurance races.\n'}]}]