Question: who designed the national flag of south africa
[{'answer': 'Frederick Brownell', 'provenance': [{'wikipedia_id': '89355', 'title': 'Flag of South Africa', 'start_paragraph_id': 1, 'start_character': 264, 'end_paragraph_id': 1, 'end_character': 282, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '89355', 'title': 'Flag of South Africa', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 362, 'bleu_score': 0.8971081702167891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10163750645059254668}, 'section': 'Section::::Abstract.'}]}]