Question: when was swimming first introduced to the commonwealth games
[{'answer': '1930', 'provenance': [{'wikipedia_id': '4462031', 'title': 'Swimming at the Commonwealth Games', 'start_paragraph_id': 1, 'start_character': 178, 'end_paragraph_id': 1, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4462031', 'title': 'Swimming at the Commonwealth Games', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12791060846493068548}, 'section': 'Section::::Abstract.'}]}]