Question: matter that is not the same throughout is called
[{'answer': 'heterogeneous mixture', 'provenance': [{'wikipedia_id': '23672776', 'title': 'Homogeneous and heterogeneous mixtures', 'start_paragraph_id': 0, 'start_character': 16, 'end_paragraph_id': 0, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]