Question: what is the significance of baghdad in islam
[{'answer': 'Centre of Learning', 'provenance': [{'wikipedia_id': '4492', 'title': 'Baghdad', 'start_paragraph_id': 1, 'start_character': 500, 'end_paragraph_id': 1, 'end_character': 518, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4492', 'title': 'Baghdad', 'start_paragraph_id': 1, 'start_character': 35, 'end_paragraph_id': 1, 'end_character': 518, 'bleu_score': 0.8669346455106991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9713895455780801968}, 'section': 'Section::::Abstract.'}]}]