Question: what song did ed sheeran wrote for justin bieber
[{'answer': "`` Love Yourself ''"}, {'provenance': [{'wikipedia_id': '48630530', 'title': 'Love Yourself', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 600, 'bleu_score': 0.891863661410034, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 926654801144055132}, 'section': 'Section::::Abstract.'}]}]