Question: when did twenty one pilots signed to fueled by ramen
[{'answer': 'Fueled by Ramen', 'provenance': [{'wikipedia_id': '38337784', 'title': 'Twenty One Pilots', 'start_paragraph_id': 2, 'start_character': 138, 'end_paragraph_id': 2, 'end_character': 153, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]