Question: who was the most subscribed person on youtube in 2011
[{'answer': 'Ray William Johnson', 'provenance': [{'wikipedia_id': '40199886', 'title': 'List of most-subscribed YouTube channels', 'start_paragraph_id': 11, 'start_character': 80, 'end_paragraph_id': 11, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Milestones and reactions.\n'}]}]