Question: which european nation used australia as a penal colony
[{'answer': 'Britain', 'provenance': [{'wikipedia_id': '3808294', 'title': 'Convicts in Australia', 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3808294', 'title': 'Convicts in Australia', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1124, 'bleu_score': 0.886702769015946, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14052935210130856478}, 'section': 'Section::::Abstract.'}]}]