Question: what is the proper term used for the signature given by celebrities to their fans
[{'answer': 'Autograph', 'provenance': [{'wikipedia_id': '86260', 'title': 'Autograph', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]