Question: who was the treaty of waitangi signed by
[{'answer': 'representatives of the British Crown', 'provenance': [{'wikipedia_id': '127254', 'title': 'Treaty of Waitangi', 'start_paragraph_id': 1, 'start_character': 73, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Māori chiefs ( Rangatira ) from the North Island of New Zealand'}, {'provenance': [{'wikipedia_id': '127254', 'title': 'Treaty of Waitangi', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 0.8942775337825261, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4961836310262717459}, 'section': 'Section::::Abstract.'}]}]