Question: who is the president of costa rica 2017
[{'answer': 'Luis Guillermo Solís Rivera', 'provenance': [{'wikipedia_id': '41760410', 'title': 'Luis Guillermo Solís', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41760410', 'title': 'Luis Guillermo Solís', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 533, 'bleu_score': 0.6470429898402811, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9843978839948586891}, 'section': 'Section::::Abstract.'}]}]