Question: when did new zealand and south africa first play rugby against each other
[{'answer': '1921', 'provenance': [{'wikipedia_id': '6087347', 'title': 'History of rugby union matches between New Zealand and South Africa', 'start_paragraph_id': 1, 'start_character': 110, 'end_paragraph_id': 1, 'end_character': 114, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6087347', 'title': 'History of rugby union matches between New Zealand and South Africa', 'start_paragraph_id': 1, 'start_character': 46, 'end_paragraph_id': 1, 'end_character': 770, 'bleu_score': 0.723245613612698, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14214218906843436542}, 'section': 'Section::::Abstract.'}]}]