Question: who wrote the song we'll meet again
[{'answer': 'Ross Parker', 'provenance': [{'wikipedia_id': '2291655', 'title': "We'll Meet Again", 'start_paragraph_id': 1, 'start_character': 140, 'end_paragraph_id': 1, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Hughie Charles', 'provenance': [{'wikipedia_id': '2291655', 'title': "We'll Meet Again", 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 170, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]