Question: who is the second most subscribed channel on youtube
[{'answer': 'T - Series', 'provenance': [{'wikipedia_id': '40199886', 'title': 'List of most-subscribed YouTube channels', 'start_paragraph_id': 13, 'start_character': 68, 'end_paragraph_id': 13, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Milestones and reactions.:PewDiePie vs T-Series.\n'}]}]