Question: who was contracted to design golden gate park
[{'answer': 'William Hammond Hall', 'provenance': [{'wikipedia_id': '415576', 'title': 'Golden Gate Park', 'start_paragraph_id': 4, 'start_character': 493, 'end_paragraph_id': 4, 'end_character': 513, 'bleu_score': 1.0, 'section': 'Section::::History.:Development.\n'}]}, {'answer': 'John McLaren', 'provenance': [{'wikipedia_id': '415576', 'title': 'Golden Gate Park', 'start_paragraph_id': 5, 'start_character': 64, 'end_paragraph_id': 5, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::History.:Development.\n'}]}, {'answer': 'Calvert Vaux'}]