Question: who was involved in the waterloo creek massacre
[{'answer': 'mounted police', 'provenance': [{'wikipedia_id': '615573', 'title': 'Waterloo Creek massacre', 'start_paragraph_id': 1, 'start_character': 111, 'end_paragraph_id': 1, 'end_character': 125, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'civilian vigilantes', 'provenance': [{'wikipedia_id': '615573', 'title': 'Waterloo Creek massacre', 'start_paragraph_id': 1, 'start_character': 127, 'end_paragraph_id': 1, 'end_character': 146, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Gamilaraay Australians'}, {'provenance': [{'wikipedia_id': '615573', 'title': 'Waterloo Creek massacre', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 645, 'bleu_score': 0.521051976126056, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 833129903224205369}, 'section': 'Section::::Abstract.'}]}]