Question: who is the old guy in all the marvel movies
[{'answer': 'Stan Lee', 'provenance': [{'wikipedia_id': '18598186', 'title': 'Stan Lee', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]