With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Buckingham Palace is a library.
text_B: Buckingham Palace -LRB- -LSB- ˈbʌkɪŋəm ˈpælɪs -RSB- -RRB- is the London residence and administrative headquarters of the reigning monarch of the United Kingdom .. London. London. monarch of the United Kingdom. monarchy of the United Kingdom. Located in the City of Westminster , the palace is often at the centre of state occasions and royal hospitality .. City of Westminster. City of Westminster. It has been a focal point for the British people at times of national rejoicing and mourning .. British people. British people. Originally known as Buckingham House , the building at the core of today 's palace was a large townhouse built for the Duke of Buckingham in 1703 on a site that had been in private ownership for at least 150 years .. townhouse. townhouse. Duke of Buckingham. John Sheffield, 1st Duke of Buckingham and Normanby. It was acquired by King George III in 1761 as a private residence for Queen Charlotte and became known as The Queen 's House .. Queen Charlotte. Charlotte of Mecklenburg-Strelitz. During the 19th century it was enlarged , principally by architects John Nash and Edward Blore , who constructed three wings around a central courtyard .. John Nash. John Nash ( architect ). Buckingham Palace became the London residence of the British monarch on the accession of Queen Victoria in 1837 .. London. London. Queen Victoria. Queen Victoria. The last major structural additions were made in the late 19th and early 20th centuries , including the East front , which contains the well-known balcony on which the royal family traditionally congregates to greet crowds .. The palace chapel was destroyed by a German bomb during World War II ; the Queen 's Gallery was built on the site and opened to the public in 1962 to exhibit works of art from the Royal Collection .. Royal Collection. Royal Collection. The original early 19th-century interior designs , many of which survive , include widespread use of brightly coloured scagliola and blue and pink lapis , on the advice of Sir Charles Long .. scagliola. scagliola. lapis. Lapis lazuli. King Edward VII oversaw a partial redecoration in a Belle Epoque cream and gold colour scheme .. Belle Epoque. Belle Epoque. Many smaller reception rooms are furnished in the Chinese regency style with furniture and fittings brought from the Royal Pavilion at Brighton and from Carlton House .. regency. Chinoiserie. Royal Pavilion. Royal Pavilion. Brighton. Brighton. Carlton House. Carlton House, London. The palace has 775 rooms , and the garden is the largest private garden in London .. London. London. the garden. Buckingham Palace Garden. The state rooms , used for official and state entertaining , are open to the public each year for most of August and September and on some days in winter and spring .
related.