Question: where does the iron in your blood come from
[{'answer': 'receptor - mediated endocytosis', 'provenance': [{'wikipedia_id': '3335116', 'title': 'Human iron metabolism', 'start_paragraph_id': 33, 'start_character': 47, 'end_paragraph_id': 33, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Mechanisms of iron regulation.:Cellular iron regulation.:Iron import.\n'}]}, {'provenance': [{'wikipedia_id': '3335116', 'title': 'Human iron metabolism', 'start_paragraph_id': 33, 'start_character': 0, 'end_paragraph_id': 33, 'end_character': 678, 'bleu_score': 0.9351165321738291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10185821565243993239}, 'section': 'Section::::Mechanisms of iron regulation.:Cellular iron regulation.:Iron import.\n'}]}]