Question: who proved that cells come from other cells
[{'answer': 'Robert Remak', 'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 21, 'start_character': 94, 'end_paragraph_id': 21, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::Cell theory.\n'}]}, {'answer': 'Robert Hooke', 'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 1, 'start_character': 526, 'end_paragraph_id': 1, 'end_character': 538, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'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.'}]}, {'answer': 'Rudolf Virchow', 'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 1, 'start_character': 954, 'end_paragraph_id': 1, 'end_character': 968, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14711896948823085144}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 517, 'bleu_score': 0.9451526628827591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14711896948823085144}, 'section': 'Section::::Cell theory.\n'}]}, {'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': 14711896948823085144}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory.', 'This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory.', 'In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1839. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. It was an important step in the movement away from spontaneous generation.']}}]}, {'provenance': [{'wikipedia_id': '102858', 'title': 'Cell theory', 'section': 'Section::::Cell theory.\n', 'start_paragraph_id': 18, 'end_paragraph_id': 18, 'meta': {'evidence_span': ['Credit for developing cell theory is usually given to two scientists: Theodor Schwann and Matthias Jakob Schleiden. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it.', 'Credit for developing cell theory is usually given to two scientists: Theodor Schwann and Matthias Jakob Schleiden. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it. In 1839, Schleiden suggested that every structural part of a plant was made up of cells or the result of cells. He also suggested that cells were made by a crystallization process either within other cells or from the outside. However, this was not an original idea of Schleiden. He claimed this theory as his own, though Barthelemy Dumortier had stated it years before him. This crystallization process is no longer accepted with modern cell theory. In 1839, Theodor Schwann states that along with plants, animals are composed of cells or the product of cells in their structures.', 'Credit for developing cell theory is usually given to two scientists: Theodor Schwann and Matthias Jakob Schleiden. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it. In 1839, Schleiden suggested that every structural part of a plant was made up of cells or the result of cells. He also suggested that cells were made by a crystallization process either within other cells or from the outside. However, this was not an original idea of Schleiden. He claimed this theory as his own, though Barthelemy Dumortier had stated it years before him. This crystallization process is no longer accepted with modern cell theory. In 1839, Theodor Schwann states that along with plants, animals are composed of cells or the product of cells in their structures. This was a major advancement in the field of biology since little was known about animal structure up to this point compared to plants. From these conclusions about plants and animals, two of the three tenets of cell theory were postulated.']}}]}]