Question: who wrote the song demons by imagine dragons
[{'answer': 'Imagine Dragons', 'provenance': [{'wikipedia_id': '37789667', 'title': 'Demons (Imagine Dragons song)', 'start_paragraph_id': 0, 'start_character': 8, 'end_paragraph_id': 0, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Alex da Kid', 'provenance': [{'wikipedia_id': '37789667', 'title': 'Demons (Imagine Dragons song)', 'start_paragraph_id': 1, 'start_character': 96, 'end_paragraph_id': 1, 'end_character': 107, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37789667', 'title': 'Demons (Imagine Dragons song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 741, 'bleu_score': 0.9845548242372031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11309512073649383663}, 'section': 'Section::::Abstract.'}]}]