Question: what infinity stone is in vision's head
[{'answer': 'Mind Stone', 'provenance': [{'wikipedia_id': '606571', 'title': 'Infinity Gems', 'start_paragraph_id': 11, 'start_character': 854, 'end_paragraph_id': 11, 'end_character': 864, 'bleu_score': 1.0, 'section': 'Section::::Publication history.\n'}]}]