Question: what is the liquid in the brain called
[{'answer': 'Cerebrospinal fluid', 'provenance': [{'wikipedia_id': '7632', 'title': 'Cerebrospinal fluid', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7632', 'title': 'Cerebrospinal fluid', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 547, 'bleu_score': 0.9511135937842321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17073600871972589611}, 'section': 'Section::::Abstract.'}]}]