You will be given a definition of a task first, then some input of the task.
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].

Chelsea have beaten Manchester United in the chase to sign Pedro from Barcelona and Old Trafford manager Louis van Gaal faces more misery in his bid to prise Sadio Mane from Southampton. Jose Mourinho made a personal intervention to beat his old mentor Van Gaal to Pedro. Mourinho's personal call helped convince the 28-year-old Spain striker Stamford Bridge was the right destination. Chelsea struck a deal for £21.1million, with £19m paid up front, more than United offered. Pedro is expected to complete the transfer after a medical on Thursday and be available for Sunday's game at West Bromwich Albion if there are no complications.Pedro will undergo a medical on Thursday ahead of his move to ChelseaPremier League champions will pay £19m up front for the Barcelona manManchester United boss Louis van Gaal had doubts about signing PedroSpain star was keen to join Chelsea after receiving call from Jose MourinhoUnited have since attempted to sign Southampton winger Sadio ManeThomas Muller remains a target as club look to complete one major dealREAD: Manchester United, Arsenal, Chelsea and Man City transfer specialREAD: Manchester United's failed attempt to bring in Pedro is not a rarityIt's not too late to sign up to MailOnline's new Fantasy Football game 
 Question:_ are working on one major signing they hope to complete before the transfer window closes on September 1.
Output:
Manchester United