Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Britain could become a one party state with the Tories always in power if Labour elect Jeremy Corbyn, David Miliband warned today. The former foreign secretary, who lost out on the leadership to his brother Ed in 2010, revealed he was backing Liz Kendall because of her 'plain speaking, fresh thinking and political courage'. He said he would give Yvette Cooper his second choice after she spoke out against 'the siren calls of the Corbyn campaign'. Mr Miliband, who now runs the refugee charity International Rescue Committee in New York, attacked Mr Corbyn's calls for mass-re-nationalisations and hikes in national insurance for those earning more than £50,000.Former foreign secretary backs outsider Liz Kendall to succeed his brotherSays 'siren calls of the Corbyn campaign' will turn party into protest groupMr Miliband reveals he will give Yvette Cooper his second preferenceComes after Gordon Brown joined Tony Blair in warning against Mr CorbynBut Andy Burnham today pledged to adopt swathes of his hard-left agenda 
 Question:Mr _ said Mr Corbyn had brought 'real energy to this race' and he would 'involve' his rival in his team from the outset.
Output:
Andy Burnham