Question: who said all living things are composed of cells
[{'answer': 'Matthias Schleiden', 'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 1, 'start_character': 878, 'end_paragraph_id': 1, 'end_character': 896, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Theodor Schwann', 'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 1, 'start_character': 901, 'end_paragraph_id': 1, 'end_character': 916, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 983, 'bleu_score': 0.8610741226635661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14830971517219815939}, 'section': 'Section::::Abstract.'}]}]