Question: where is urinary bladder located in human body
[{'answer': 'on the pelvic floor', 'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'start_paragraph_id': 1, 'start_character': 251, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'pelvic floor', 'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'start_paragraph_id': 1, 'start_character': 258, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'at the base of the pelvis'}, {'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 316, 'bleu_score': 0.9036816878108531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6644625232078016185}, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 468, 'bleu_score': 0.842682225614034, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6644625232078016185}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 523, 'bleu_score': 0.943950247594541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6644625232078016185}, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '32259', 'title': 'Urinary bladder', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination. In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor.', 'In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor.']}}]}]