Question: Who was contracted to design golden gate park?
Disambiguated questions and answers: question: Who was contracted as commissioner to design golden gate park?
Who was contracted to design golden gate park as Hall's assistant and successfully introduced new plant species?
answer: William Hammond Hall
John McLaren
Dr John Hays McLaren
Natural Questions answer: William Hammond Hall
John McLaren
Calvert Vaux (from the Wikipedia article "Golden Gate Park")