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Airbnb CEO Brian Chesky announced a $100 million donation to San Francisco's parks, the largest single-donor gift in the city's history. Mayor Daniel Lurie joined Chesky for the announcement in Golden Gate Park last week. Chesky founded Airbnb in San Francisco 18 years ago, and the company is still headquartered there. Good News Network reported the gift, which is aimed at public parks across the city. The report did not include details on how the funds will be distributed or on a timeline for spending.