Question: when was the new national flag of the republic of south africa hoisted for the first time
[{'answer': '27 April 1994', 'provenance': [{'wikipedia_id': '89355', 'title': 'Flag of South Africa', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '89355', 'title': 'Flag of South Africa', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 223, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15689153944366843894}, 'section': 'Section::::History.:Current flag since 1994.\n'}]}]