Question: who won survivor blood vs water san juan del sur
[{'answer': 'Natalie Anderson', 'provenance': [{'wikipedia_id': '42828508', 'title': 'Survivor: San Juan del Sur', 'start_paragraph_id': 1, 'start_character': 487, 'end_paragraph_id': 1, 'end_character': 503, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42828508', 'title': 'Survivor: San Juan del Sur', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 560, 'bleu_score': 0.8553903516120881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9537224583801116892}, 'section': 'Section::::Abstract.'}]}]