Question: when did rugby league go professional in australia
[{'answer': '1907', 'provenance': [{'wikipedia_id': '2502889', 'title': 'Rugby league in Australia', 'start_paragraph_id': 7, 'start_character': 225, 'end_paragraph_id': 7, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::History.:1900s.\n'}]}, {'provenance': [{'wikipedia_id': '2502889', 'title': 'Rugby league in Australia', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 1293, 'bleu_score': 0.8137766623095211, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17481744535346197238}, 'section': 'Section::::History.:1900s.\n'}]}]