Question: who announced that south africa would join the war
[{'answer': 'Smuts', 'provenance': [{'wikipedia_id': '7225971', 'title': 'Military history of South Africa during World War II', 'start_paragraph_id': 3, 'start_character': 510, 'end_paragraph_id': 3, 'end_character': 515, 'bleu_score': 1.0, 'section': 'Section::::Political choices at outbreak of war.\n'}]}, {'provenance': [{'wikipedia_id': '7225971', 'title': 'Military history of South Africa during World War II', 'start_paragraph_id': 6, 'start_character': 3, 'end_paragraph_id': 6, 'end_character': 471, 'bleu_score': 0.864964395204278, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14047097393687988791}, 'section': 'Section::::Declaration of war against the Axis.\n'}]}]