Question: which animal on earth has the longest life span
[{'answer': 'tortoise', 'provenance': [{'wikipedia_id': '4622751', 'title': 'List of longest-living organisms', 'start_paragraph_id': 80, 'start_character': 38, 'end_paragraph_id': 80, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::List of longest-living organisms.:Other terrestrial and pagophilic animals.\n'}]}, {'provenance': [{'wikipedia_id': '4622751', 'title': 'List of longest-living organisms', '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': 12244948362762404508}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '140618', 'title': 'Tortoise', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['Tortoises', 'Tortoises are the longest living land animal in the world, although the longest living species of tortoise is a matter of debate. Galápagos tortoises are noted to live over 150 years, but an Aldabra giant tortoise named Adwaita may have been the longest living at an estimated 255 years. In general, most tortoise species can live 80150 years.', 'Tortoises are the longest living land animal in the world, although the longest living species of tortoise is a matter of debate. Galápagos tortoises are noted to live over 150 years, but an Aldabra giant tortoise named Adwaita may have been the longest living at an estimated 255 years']}}]}, {'provenance': [{'wikipedia_id': '46903603', 'title': 'Aldabrachelys gigantea hololissa', 'section': 'Section::::Life history.\n', 'start_paragraph_id': 8, 'end_paragraph_id': 8, 'meta': {'evidence_span': ['tortoises', 'Giant tortoises are among the longest-lived animals on the planet.', 'Today, Jonathan, a -year-old, Saint Helena-dwelling Seychelles giant tortoise, is thought to be the oldest living terrestrial animal on Earth since the 2006 death of Harriet; a 176 year old Galapagos giant tortoise who lived at Australia Zoo. Coming in second to Jonathan is Esmeralda, at years old. Esmeralda is an Aldabra giant tortoise that lives in the Galapagos Islands.']}}]}, {'provenance': [{'wikipedia_id': '4622751', 'title': 'List of longest-living organisms', 'section': 'Section::::List of longest-living organisms.:Other terrestrial and pagophilic animals.\n', 'start_paragraph_id': 80, 'end_paragraph_id': 80, 'meta': {'evidence_span': ['tortoise', 'Adwaita, an Aldabra giant tortoise, died at an estimated age of 255 in March 2006 in Alipore Zoo, Kolkata, India. If verified, it will have been the oldest terrestrial animal in the world.', 'Adwaita, an Aldabra giant tortoise, died at an estimated age of 255 in March 2006 in Alipore Zoo, Kolkata, India. If verified, it will have been the oldest terrestrial animal in the world.']}}]}]