Question: when was gymnastics introduced to the commonwealth games
[{'answer': '1978', 'provenance': [{'wikipedia_id': '23379838', 'title': 'Gymnastics at the Commonwealth Games', 'start_paragraph_id': 1, 'start_character': 128, 'end_paragraph_id': 1, 'end_character': 132, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23379838', 'title': 'Gymnastics at the Commonwealth Games', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 245, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13863544711136802158}, 'section': 'Section::::Abstract.'}]}]