Question: what is any part of a system with uniform composition and properties
[{'answer': 'phase', 'provenance': [{'wikipedia_id': '23637', 'title': 'Phase (matter)', 'start_paragraph_id': 1, 'start_character': 28, 'end_paragraph_id': 1, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23637', 'title': 'Phase (matter)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 642, 'bleu_score': 0.8986578882596251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1829217444233135581}, 'section': 'Section::::Abstract.'}]}]