Question: when did the chicago cubs become the cubs
[{'answer': '1903', 'provenance': [{'wikipedia_id': '6654', 'title': 'Chicago Cubs', 'start_paragraph_id': 1, 'start_character': 545, 'end_paragraph_id': 1, 'end_character': 549, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]