Question: who won the big brother naija last year
[{'answer': 'Efe', 'provenance': [{'wikipedia_id': '52957997', 'title': 'Big Brother Naija (season 2)', 'start_paragraph_id': 3, 'start_character': 30, 'end_paragraph_id': 3, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Summary.\n'}]}, {'provenance': [{'wikipedia_id': '52957997', 'title': 'Big Brother Naija (season 2)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 307, 'bleu_score': 0.540038833444701, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9599023464792681852}, 'section': 'Section::::Summary.\n'}]}]