Question: who established an experimental farm at mount vernon
[{'answer': 'Washington', 'provenance': [{'wikipedia_id': '152271', 'title': 'Mount Vernon', 'start_paragraph_id': 1, 'start_character': 42, 'end_paragraph_id': 1, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '152271', 'title': 'Mount Vernon', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 709, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4449852311046688004}, 'section': 'Section::::History.:George Washington (1732–1799).:Agriculture and enterprise.\n'}]}]