Question: what do the colours of the nigerian flag represent
[{'answer': 'natural wealth', 'provenance': [{'wikipedia_id': '459277', 'title': 'Flag of Nigeria', 'start_paragraph_id': 3, 'start_character': 34, 'end_paragraph_id': 3, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'peace', 'provenance': [{'wikipedia_id': '459277', 'title': 'Flag of Nigeria', 'start_paragraph_id': 3, 'start_character': 82, 'end_paragraph_id': 3, 'end_character': 87, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]