Definition: 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: Some of Labour's biggest donors have vowed to stop giving the party cash if Jeremy Corbyn is elected leader in September At least four of the troubled party's most generous supporters have now confirmed they will stop donating to Labour should the Islington North MP become the new leader. Hardline left winger Mr Corbyn's campaign has been gathering speed, but many fear his close ties to the unions and his spending plans will see them locked out of power for decades. Assem Allam, who has given more than £500,000 in recent years, Richard Brindle, who gave £100,000, and a third, anonymous donor all revealed their mistrust to The Sunday Telegraph.Assem Allam and  Richard Brindle both said they would no longer donateBoth raise concerns over Corbyn's election 'locking' Labour out of powerFollowed in the steps of John Mills, Labour's biggest individual donors 
 Question:Mr _ has said there should be a discussion around 'clause 4', a part of the party's constitution which commits to 'common ownership of the means of production'.

Jeremy Corbyn