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].

(CNN) -- The Circuit of the Americas in Austin, Texas lies just 200 miles from the Mexican border. On Sunday it will host the first U.S. Grand Prix since 2007 -- and thousands of Formula One fans are expected to cross the Rio Grande to cheer on a driver they know as "Checo." Sergio Perez has become one of the darlings of Mexico, a country that in recent times has become more synonymous for the drugs war waged by Felipe Calderon during his tenure as president. The sporting focus this weekend will be on America, but the problems of its neighbor will come into sharp focus in the Mexican town of Nuevo Laredo -- the closest crossing point for those hoping to see Perez at what is, in effect, his home race.Formula One driver Sergio Perez looking forward to his "home" race in Texas on SundayThe Mexican is expected to have thousands of fans crossing the border to support himHe has been one of F1's surprise success stories in only his second season on the gridPerez has earned a big-money move to McLaren after three podium placings in 2012 
 Question:It's the best country in the world and I'm so proud to be _," adds Perez, as his bright smile breaks out for the first time in conversation.
Mexican

Fancy the idea of a full English breakfast grown entirely in a science lab? That is the vision of Silicon Valley’s latest craze – high-tech food – and Britain may soon get its first taste if the company behind a mayonnaise made of plant, rather than egg, brings its product to the UK. It is a multi-million dollar business which has taken the US by storm and includes everything from lab-grown meat to total food replacements. Ask Rob Rhinehart, 26, how he sees the future and the computer scientist will tell you that food will eventually be made so cheap that only the rich will cook.First eggless mayo product may soon be available in British supermarketsIts arrival is part of a multi-million dollar high-tech food business big in USSilicon Valley visionaries are working on growing meat and eggs in labsCompany behind Just Mayo, which contains eggs made from plants, is rumoured to be interested in bringing product to the UK 
 Question:The American company is now looking to increase its production and expand its delivery network to other locations, including the _.
UK

Liverpool are closing in on a deal to make Roberto Firmino one of the biggest signings in their history. The Brazil international, who is currently on duty at the Copa America, is likely to cost Liverpool in the region of £28million and, should they secure his signature, his fee would only be outstripped by Andy Carroll. Firmino, who currently plays in the Bundesliga with Hoffenheim, was on Manchester United’s radar but Liverpool have been working hard to bring him to Anfield and have a scouting delegation in Chile, where the Copa America is being staged. They have now been joined in South America by chief executive Ian Ayre, who is looking to wrap up the deal.Roberto Firmino open to a move away from current club Hoffenheim during the summer transfer windowLiverpool are close to bringing the Brazilian to the Premier League in what is considered a real coupFirmino, 23, scored for Brazil during their 2-1 victory over Venezuela and has stepped in for NeymarCarlos Bacca and Salomon Rondon are also Liverpool targets as Brendan Rodgers looks to strengthen his side 
 Question:Sevilla striker _ netted 28 goals for the club last season - including two in the Europa League final - and is being watched by a host of clubs.

Carlos Bacca