Question: who released a hit song in the 80s called '99 red balloons'
[{'answer': 'the German band Nena', 'provenance': [{'wikipedia_id': '884209', 'title': '99 Luftballons', 'start_paragraph_id': 1, 'start_character': 48, 'end_paragraph_id': 1, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '884209', 'title': '99 Luftballons', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 421, 'bleu_score': 0.835215354882413, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7914923345465856935}, 'section': 'Section::::Abstract.'}]}]