Question: who is the leader of the ontario libertarian party
[{'answer': 'Rob Ferguson', 'provenance': [{'wikipedia_id': '482427', 'title': 'Ontario Libertarian Party', 'start_paragraph_id': 1, 'start_character': 613, 'end_paragraph_id': 1, 'end_character': 625, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]