Question: how many species of mangroves are there in australia
[{'answer': '45', 'provenance': [{'wikipedia_id': '30586144', 'title': 'Australian mangroves', 'start_paragraph_id': 6, 'start_character': 37, 'end_paragraph_id': 6, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::Flora.\n'}]}, {'provenance': [{'wikipedia_id': '30586144', 'title': 'Australian mangroves', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 235, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12504364909905541747}, 'section': 'Section::::Flora.\n'}]}]