Question: 4 arteries that supply blood to the brain
[{'answer': 'Internal carotid arteries', 'provenance': [{'wikipedia_id': '840450', 'title': 'Cerebral circulation', 'start_paragraph_id': 5, 'start_character': 181, 'end_paragraph_id': 5, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::Anatomy.:Blood supply.\n'}]}, {'answer': 'Anterior cerebral artery', 'provenance': [{'wikipedia_id': '840450', 'title': 'Cerebral circulation', 'start_paragraph_id': 9, 'start_character': 261, 'end_paragraph_id': 9, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::Anatomy.:Blood supply.:Anterior cerebral circulation.\n'}]}, {'answer': 'Anterior communicating artery', 'provenance': [{'wikipedia_id': '840450', 'title': 'Cerebral circulation', 'start_paragraph_id': 11, 'start_character': 12, 'end_paragraph_id': 11, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Anatomy.:Blood supply.:Anterior cerebral circulation.\n'}]}, {'answer': 'Middle cerebral artery', 'provenance': [{'wikipedia_id': '840450', 'title': 'Cerebral circulation', 'start_paragraph_id': 9, 'start_character': 312, 'end_paragraph_id': 9, 'end_character': 334, 'bleu_score': 1.0, 'section': 'Section::::Anatomy.:Blood supply.:Anterior cerebral circulation.\n'}]}, {'provenance': [{'wikipedia_id': '840450', 'title': 'Cerebral circulation', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 334, 'bleu_score': 0.525135201195253, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1314445539764450626}, 'section': 'Section::::Anatomy.:Blood supply.:Anterior cerebral circulation.\n'}]}]