Question: who sings the last song in the hobbit 2
[{'answer': 'Ed Sheeran', 'provenance': [{'wikipedia_id': '40978507', 'title': 'I See Fire', 'start_paragraph_id': 1, 'start_character': 78, 'end_paragraph_id': 1, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40978507', 'title': 'I See Fire', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 423, 'bleu_score': 0.7994699495668861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2597535731886933070}, 'section': 'Section::::Abstract.'}]}]