Task: Question Answering
Input (English): Passage: After 12 years as commissioner of the AFL, David Baker retired unexpectedly on July 25, 2008, just two days before ArenaBowl XXII; deputy commissioner Ed Policy was named interim commissioner until Baker's replacement was found. Baker explained, "When I took over as commissioner, I thought it would be for one year. It turned into 12. But now it's time." Question: Who was the commissioner of the Arena Football League for the first half of 2008?
Output (English): David Baker