Question: who sang the song i wish you were here
[{'answer': 'Pink Floyd', 'provenance': [{'wikipedia_id': '30220496', 'title': 'Wish You Were Here (Pink Floyd song)', 'start_paragraph_id': 0, 'start_character': 20, 'end_paragraph_id': 0, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]