Question: is indigo a shade of blue or purple
[{'answer': 'blue', 'provenance': [{'wikipedia_id': '15250', 'title': 'Indigo', 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15250', 'title': 'Indigo', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 380, 'bleu_score': 0.9348189981364851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18171752158166381753}, 'section': 'Section::::Abstract.'}]}]