Question: who sang i was kaiser bill's batman
[{'answer': 'Die Travellers', 'provenance': [{'wikipedia_id': '26446840', 'title': "I Was Kaiser Bill's Batman", 'start_paragraph_id': 4, 'start_character': 146, 'end_paragraph_id': 4, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26446840', 'title': "I Was Kaiser Bill's Batman", 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 470, 'bleu_score': 0.9766041382465441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10823892563838079169}, 'section': 'Section::::Abstract.'}]}]