Question: who sang i will be home for christmas
[{'answer': 'Bing Crosby', 'provenance': [{'wikipedia_id': '33971745', 'title': "I'll Be Home for Christmas", 'start_paragraph_id': 4, 'start_character': 311, 'end_paragraph_id': 4, 'end_character': 322, 'bleu_score': 1.0, 'section': 'Section::::Writing and copyright.\n'}]}]