Question: Larry is the 10 Downing Street, official resident cat of the Prime Minister of the UK, also called? 

full_context: Document 1: Humphrey (cat): Humphrey (c. 1988 – March 2006) was a cat employed as the Chief Mouser to the Cabinet Office at 10 Downing Street, the official residence of the Prime Minister of the United Kingdom, from October 1989 to 13 November 1997.
Document 2: Luna the Fashion Kitty: Luna the Fashion Kitty is a Himalayan cat with a following on the Internet that centers on a Facebook page where she shares her outfits each day. She also shares information about cat grooming and cat rescue info, specifically focusing on the Persian and Himalayan breeds. Her Facebook page essentially functions as a social media community for cat lovers and fashion fans.
Document 3: Beast of Exmoor: There have been numerous reports of eyewitness sightings, however the official Exmoor National Park website lists the beast under "Traditions, Folklore, and Legends", and the BBC calls it "the famous-yet-elusive beast of Exmoor." Sightings were first reported in the 1970s, although it became notorious in 1983, when a South Molton farmer claimed to have lost over 100 sheep in the space of three months, all of them apparently killed by violent throat injuries. Descriptions of its coloration range from black to tan or dark grey. It is possibly a cougar or black leopard which was released sometime in the 1960s or 1970s after a law was passed making it illegal for them to be kept in captivity outside zoos. However, considering that cougar and leopard life spans are 12–15 years, this is unlikely. In 2006 the British Big Cats Society reported that a skull found by a Devon farmer was that of a puma, however the Department for Environment, Food and Rural Affairs (Defra) states that "Based on the evidence, Defra does not believe that there are big cats living in the wild in England."
Document 4: Great Offices of State: The Great Offices of State in the United Kingdom are the four most senior and prestigious posts in the British government. They are the Prime Minister, Chancellor of the Exchequer, Foreign Secretary and Home Secretary. According to convention, when the Prime Minister names his or her Cabinet, either after a general election or a mid-term reshuffle, the first Cabinet ministers to be announced are the Chancellor, the Foreign Secretary and the Home Secretary.
Document 5: Chief Mouser to the Cabinet Office: The Chief Mouser to the Cabinet Office is the title of the official resident cat of the Prime Minister of the United Kingdom at 10 Downing Street. Only four cats, Humphrey, Sybil, Larry and Freya have been given the title officially; other cats were given this title affectionately, usually by the British press. There has been a resident Treasury or Downing Street cat employed as a mouser and pet since the reign of Henry VIII, when Cardinal Wolsey placed his cat by his side while acting in his judicial capacity as Lord Chancellor, an office he assumed in 1515.
Document 6: Home Office under Theresa May: The Home Office under Theresa May refers to the period during which British Prime Minister Theresa May served as Home Secretary. As a member of David Cameron's first government May was appointed as Home Secretary on 12 May 2010, shortly after Cameron became prime minister, and continued in the post as part of the second Cameron ministry following the 2015 general election. She held the post until she succeeded Cameron as prime minister on 13 July 2016.
Document 7: Larry (cat): Larry is the 10 Downing Street cat and is Chief Mouser to the Cabinet Office. Larry is a brown and white tabby, believed to have been born in January 2007. By July 2016, when Theresa May became Prime Minister, Larry had developed a reputation of being "violent" in his interactions with other local mousers, namely the Foreign Office's much younger cat Palmerston.
Document 8: 10 Downing Street: 10 Downing Street, colloquially known in the United Kingdom as Number 10, is the headquarters of the Government of the United Kingdom and the official residence and office of the First Lord of the Treasury, a post which, for much of the 18th and 19th centuries and invariably since 1905, has been held by the Prime Minister.
Document 9: List of Prime Ministers of the United Kingdom: The Prime Minister of the United Kingdom is the head of the Government of the United Kingdom, and chairs Cabinet meetings. There is no specific date when the office of Prime Minister first appeared, as the role was not created but rather evolved over a period of time. The term was used in the House of Commons in 1805 and it was certainly in parliamentary use by the 1880s, and in 1905 the post of Prime Minister was officially given recognition in the order of precedence. Modern historians generally consider Sir Robert Walpole, who led the government of Great Britain from 1721 to 1742, as the first Prime Minister. Walpole is also the longest-serving Prime Minister by this definition. However, Sir Henry Campbell-Bannerman was the first Prime Minister and Margaret Thatcher the longest-serving Prime Minister to have been officially referred to as such.
Document 10: Leader of the House of Commons: The Leader of the House of Commons is generally a member of the Cabinet of the United Kingdom who is responsible for arranging government business in the House of Commons. However, the current incumbent, Andrea Leadsom, is not a member of the cabinet but does attend cabinet meetings. This office does not attract a ministerial salary, and as such it is usually held jointly with another ministerial position (often a sinecure). Historically, the position was usually held by the Prime Minister if they sat in the House of Commons; in more recent years, the post has been held jointly with that of Lord President of the Council, Lord Privy Seal, or First Secretary of State.
Document 11: CC (cat): CC, for "CopyCat" "or" "Carbon Copy" (born December 22, 2001), is a brown tabby and white domestic shorthair and the first cloned pet. CC's surrogate mother was a tabby, but her genetic donor, Rainbow, was a calico domestic shorthair. The difference in hair coloration between CC and Rainbow is due to epigenetic re-programming, which normally occurs in a fertilised embryo before implantation.
Document 12: Principal Private Secretary to the Prime Minister: The Principal Private Secretary to the Prime Minister is a senior official in the British Civil Service who acts as Principal Private Secretary to the Prime Minister of the United Kingdom. The holder of this office is traditionally the head of the Prime Minister's Office. In the Civil Service, the role is currently graded as a Director-General. To date, no woman has ever occupied the office. In fiction, the character of Bernard Woolley in the television series "Yes, Prime Minister", occupied this post.
Document 13: Domestic short-haired cat: A domestic short-haired cat is a cat of mixed ancestry – thus not belonging to any particular recognized cat breed – possessing a coat of short fur. In British English, they are often referred to as moggies. Domestic short-haired cats should not be confused with the British Shorthair, American Shorthair or other standardized breeds with "Shorthair" names, which are breeds recognized by various registries. Domestic short-haireds are the most common cat in the United States, accounting for around 90–95% of their number. Other generic terms include house cat and alley cat (the latter may be used more specifically to refer to feral specimens). The term tabby cat technically refers to a coat pattern, but is also often used as a general term for cats of this sort.
Document 14: Stop Tony Meow: Stop Tony Meow is a browser extension which replaces photos of former Australian prime minister Tony Abbott with images of cats and kittens on websites. Initially created for Google Chrome, the extension was expanded to Safari and Firefox later in 2014. The extension was created by developers and designers Dan Nolan, Ben Taylor and Matt Kelsh.
Document 15: Colonel Meow: Colonel Meow (2011, adopted October 11, 2011 – January 29, 2014) was a male Himalayan–Persian crossbreed cat, who holds the 2014 Guinness world record for the longest fur on a cat (nine inches or about 23 cm). He became an Internet celebrity when his owners posted pictures of his scowling face to Facebook and Instagram. He was lovingly known by his hundreds of thousands of followers as an "adorable fearsome dictator", a "prodigious Scotch drinker" and "the angriest cat in the world".
ground_truth: Chief Mouser to the Cabinet Office