Question: who is the guy who sings oppa gangnam style
[{'answer': 'Psy', 'provenance': [{'wikipedia_id': '36584679', 'title': 'Gangnam Style', 'start_paragraph_id': 1, 'start_character': 75, 'end_paragraph_id': 1, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36584679', 'title': 'Gangnam Style', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 683, 'bleu_score': 0.8909604117986291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17146736597843591627}, 'section': 'Section::::Abstract.'}]}]