Question: What Prince Regent likely stayed in Carlton House in 1811?

full_context: Document 1: Beau Brummell: George Bryan "Beau" Brummell (7 June 1778 – 30 March 1840) was an iconic figure in Regency England, the arbiter of men's fashion, and a friend of the Prince Regent, the future King George IV. He established the mode of dress for men that rejected overly ornate fashions for one of understated, but perfectly fitted and tailored bespoke garments. This look was based on dark coats, full-length trousers rather than knee breeches and stockings, and above all immaculate shirt linen and an elaborately knotted cravat.
Document 2: Carlton House Terrace: Carlton House Terrace is a street in the St James's district of the City of Westminster in London. Its principal architectural feature is a pair of terraces of white stucco-faced houses on the south side of the street overlooking St. James's Park. These terraces were built on Crown land between 1827 and 1832 to overall designs by John Nash, but with detailed input by other architects including Decimus Burton. They took the place of Carlton House, and the freehold still belongs to the Crown Estate.
Document 3: Cornwall Terrace: Cornwall Terrace (also 1-21 Cornwall Terrace) is a Grade I listed building of consecutive terraced mansions overlooking Regent's Park in the City of Westminster, London. It is situated at the park's southwest corner, near Baker Street, between York Terrace and Clarence Terrace, within the park's Crown Estate development. Cornwall Terrace was part of the scheme of the Prince Regent, later King George IV, to develop grand housing in Regent's Park.
Document 4: Carlton House desk: A Carlton House desk is a specific antique desk form within the more general bureau à gradin form. This form of desk is supposed to have been designed in the 18th century for the Prince of Wales (who later became George IV) by George Hepplewhite. It is named after Carlton House, which was at the time the London residence of the Prince, and sometimes is also known as a Carlton House writing table.
Document 5: George V of Hanover: George V (George Frederick Alexander Charles Ernest Augustus; German: "Georg Friedrich Alexander Karl Ernst August" ; 27 May 1819 – 12 June 1878) was the last king of Hanover, the only child and successor of King Ernest Augustus. George V's reign was ended by the Unification of Germany.
Document 6: Grosvenor House: Grosvenor House was one of the largest private townhouses situated on Park Lane in London. The house was the home of the Grosvenor family (better known as the Dukes of Westminster) for more than a century. Their original London dwelling was on Millbank but, after the family had developed their Mayfair estates, they moved to Park Lane to build a house worthy of their wealth, status and influence in the 19th century.
Document 7: George IV of the United Kingdom: George IV (George Augustus Frederick; 12 August 1762 – 26 June 1830) was King of the United Kingdom of Great Britain and Ireland and of Hanover following the death of his father, George III, on 29 January 1820, until his own death ten years later. From 1811 until his accession, he served as Prince Regent during his father's final mental illness.
Document 8: George I of Great Britain: George I (George Louis; German: "Georg Ludwig" ; 28 May 1660 – 11 June 1727) was King of Great Britain and Ireland from 1 August 1714 until his death, and ruler of the Duchy and Electorate of Brunswick-Lüneburg (Hanover) in the Holy Roman Empire from 1698.
Document 9: George II of Great Britain: George II (George Augustus; German: "Georg II. August" ; 30 October / 9 November 1683  – 25 October 1760) was King of Great Britain and Ireland, Duke of Brunswick-Lüneburg (Hanover) and Prince-elector of the Holy Roman Empire from 11 June 1727 (O.S.) until his death.
Document 10: Cumberland Terrace: Cumberland Terrace is a neoclassical terrace on the eastern side of Regent's Park in the London Borough of Camden, completed in 1826. It was one of several terraces and crescents around Regent's Park designed by the British architect John Nash (1752–1835), under the patronage of the Prince Regent (later George IV). The terrace was to stand opposite the Prince's proposed palace in the park and was therefore of particular importance in the scheme. It was named after the King's younger brother, the Duke of Cumberland.
Document 11: Regency era: The Regency in Great Britain was a period when King George III was deemed unfit to rule and his son ruled as his proxy as Prince Regent. On the death of George III in 1820, the Prince Regent became George IV. The term Regency (or Regency era) can refer to various stretches of time; some are longer than the decade of the formal Regency which lasted from 1811–1820. The period from 1795 to 1837, which includes the latter part of the reign of George III and the reigns of his sons George IV and William IV, is often regarded as the Regency era, characterised by distinctive trends in British architecture, literature, fashions, politics, and culture. The Regency era ended in 1837 when Queen Victoria succeeded William IV.
Document 12: George III of the United Kingdom: George III (George William Frederick; 4 June 1738 – 29 January 1820) was King of Great Britain and Ireland from 25 October 1760 until the union of the two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death. He was concurrently Duke and prince-elector of Brunswick-Lüneburg ("Hanover") in the Holy Roman Empire until his promotion to King of Hanover on 12 October 1814. He was the third British monarch of the House of Hanover, but unlike his two predecessors, he was born in Britain, spoke English as his first language, and never visited Hanover.
Document 13: Carlton House: Carlton House was a mansion in London, best known as the town residence of the Prince Regent for several decades from 1783. It faced the south side of Pall Mall, and its gardens abutted St. James's Park in the St James's district of London. The location of the house, now replaced by Carlton House Terrace, was a main reason for the creation of John Nash's ceremonial route from St James's to Regent's Park via Regent Street, Portland Place and Park Square: Lower Regent Street and Waterloo Place were originally laid out to form the approach to its front entrance ("illustration, right").
Document 14: George V: George V (George Frederick Ernest Albert; 3 June 1865 – 20 January 1936) was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936.
Document 15: Carlton House Block: The Carlton House Block is a historic commercial and retail block at 9-13 Hampden Street in Springfield, Massachusetts. The six-bay three story brick building was built in 1875 with Italianate detailing. Its name derives from its site, which was previously the location of the Carlton House Hotel. It was built for lease to one of the leading shoe and boot wholesale manufacturers in the area; they occupied the premises until 1897, after which it has seen a variety of tenants. The building was listed on the National Register of Historic Places in 1983.
ground_truth: George IV