Question: vitu levu is the largest island on which group of islands
[{'answer': 'the Republic of Fiji', 'provenance': [{'wikipedia_id': '874995', 'title': 'Viti Levu', 'start_paragraph_id': 1, 'start_character': 49, 'end_paragraph_id': 1, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '874995', 'title': 'Viti Levu', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 160, 'bleu_score': 0.8283995163558051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15774006846252418099}, 'section': 'Section::::Abstract.'}]}]