title: Prizefighter series
context: The Prizefighter series was a professional boxing tournament created by boxing promoter Barry Hearn and aired on Sky Sports. The format has an initial eight fighters, who compete in four quarter-finals of 3 x 3 minute rounds (number and length of the rounds is same as in amateur boxing) followed by two semi-finals and one final all on the same night.[1] The total prize money of the tournament is £80,000 with the winner of the tournament taking home £32,000, a figure that has increased from the initial top prize of £25,000 when the tournament first aired in April 2008. There have been 34 Prizefighter tournaments so far featuring 14 different weight divisions. The last tournament was held in 2015.
question: When did The Prizefighter series begin?
answers: April 2008