Question: who are the finalists on masterchef australia 2017
[{'answer': 'Diana Chan', 'provenance': [{'wikipedia_id': '53634998', 'title': 'MasterChef Australia (series 9)', 'start_paragraph_id': 2, 'start_character': 23, 'end_paragraph_id': 2, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ben Ungermann', 'provenance': [{'wikipedia_id': '53634998', 'title': 'MasterChef Australia (series 9)', 'start_paragraph_id': 2, 'start_character': 62, 'end_paragraph_id': 2, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]