Question: who sings nothing's gonna stop us now
[{'answer': 'Starship', 'provenance': [{'wikipedia_id': '5472954', 'title': "Nothing's Gonna Stop Us Now", 'start_paragraph_id': 1, 'start_character': 137, 'end_paragraph_id': 1, 'end_character': 145, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5472954', 'title': "Nothing's Gonna Stop Us Now", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 790, 'bleu_score': 0.8328115824105411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11800590354534982852}, 'section': 'Section::::Abstract.'}]}]