Among his countless other ventures, which tech founder once owned an NBA team, an NFL team, and a chunk of an MLS team?

Microsoft cofounder Paul Allen once owned the Seattle Seahawks, the Portland Trail Blazers, and a portion of the Seattle Sounders. In addition to his many investment interests, Allen was a celebrated philanthropist. Prior to his death from non-Hodgkin's lymphoma, he gave more than $2 billion towards the advancement of science, technology, education, wildlife conservation, the arts, and community services.

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