Question: where are red blood cells made in adults
[{'answer': 'in the bone marrow', 'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'start_paragraph_id': 3, 'start_character': 354, 'end_paragraph_id': 3, 'end_character': 372, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'in the red bone marrow of large bones'}, {'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'start_paragraph_id': 92, 'start_character': 0, 'end_paragraph_id': 92, 'end_character': 521, 'bleu_score': 0.9768747032089851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4172481325698744954}, 'section': 'Section::::Life cycle.:Creation.\n'}]}, {'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', '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': 4172481325698744954}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 670, 'bleu_score': 0.9522287480520011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4172481325698744954}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '67158', 'title': 'Red blood cell', 'section': 'Section::::Abstract.', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ['The cells develop in the bone marrow and circulate for about 100120 days in the body before their components are recycled by macrophages', 'The cells develop in the bone marrow', "In humans, mature red blood cells are flexible and oval biconcave disks. They lack a cell nucleus and most organelles, in order to accommodate maximum space for hemoglobin; they can be viewed as sacks of hemoglobin, with a plasma membrane as the sack. Approximately 2.4 million new erythrocytes are produced per second in human adults. The cells develop in the bone marrow and circulate for about 100120 days in the body before their components are recycled by macrophages. Each circulation takes about 60 seconds (one minute). Approximately a quarter of the cells in the human body are red blood cells. Nearly half of the blood's volume (40% to 45%) is red blood cells."]}}]}, {'provenance': [{'wikipedia_id': '3997', 'title': 'Blood', 'section': 'Section::::Physiology.:Production and degradation of blood cells.\n', 'start_paragraph_id': 49, 'end_paragraph_id': 49, 'meta': {'evidence_span': ['In vertebrates, the various cells of blood are made in the bone marrow in a process called hematopoiesis,', 'the various cells of blood are made in the bone marrow in a process called hematopoiesis', 'In vertebrates, the various cells of blood are made in the bone marrow in a process called hematopoiesis, which includes erythropoiesis, the production of red blood cells; and myelopoiesis, the production of white blood cells and platelets. During childhood, almost every human bone produces red blood cells; as adults, red blood cell production is limited to the larger bones: the bodies of the vertebrae, the breastbone (sternum), the ribcage, the pelvic bones, and the bones of the upper arms and legs. In addition, during childhood, the thymus gland, found in the mediastinum, is an important source of T lymphocytes. The']}}]}]