Question: what are the smallest unit of life called
[{'answer': 'cell', 'provenance': [{'wikipedia_id': '4230', 'title': 'Cell (biology)', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4230', 'title': 'Cell (biology)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 272, 'bleu_score': 0.834017376365059, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12462505025401538294}, 'section': 'Section::::Abstract.'}]}]