Question: when was south africa banned from international cricket
[{'answer': '1970', 'provenance': [{'wikipedia_id': '759263', 'title': 'South Africa national cricket team', 'start_paragraph_id': 29, 'start_character': 100, 'end_paragraph_id': 29, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::History.:The post-war years.\n'}]}, {'provenance': [{'wikipedia_id': '759263', 'title': 'South Africa national cricket team', 'start_paragraph_id': 31, 'start_character': 19, 'end_paragraph_id': 31, 'end_character': 576, 'bleu_score': 0.783055375186392, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16415973159962545352}, 'section': 'Section::::History.:The international ban.\n'}]}]