Question: when was ed sheeran's song photograph released
[{'answer': '11 May 2015', 'provenance': [{'wikipedia_id': '43175225', 'title': 'Photograph (Ed Sheeran song)', 'start_paragraph_id': 3, 'start_character': 24, 'end_paragraph_id': 3, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43175225', 'title': 'Photograph (Ed Sheeran song)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 461, 'bleu_score': 0.976327165973018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 465404798926591257}, 'section': 'Section::::Abstract.'}]}]