This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[EX Q]: Passage: At the centre of this wing is the famous balcony with the Centre Room behind its glass doors. This is a Chinese-style saloon enhanced by Queen Mary, who, working with the designer Sir Charles Allom, created a more "binding" Chinese theme in the late 1920s, although the lacquer doors were brought from Brighton in 1873. Running the length of the piano nobile of the east wing is the great gallery, modestly known as the Principal Corridor, which runs the length of the eastern side of the quadrangle. It has mirrored doors, and mirrored cross walls reflecting porcelain pagodas and other oriental furniture from Brighton. The Chinese Luncheon Room and Yellow Drawing Room are situated at each end of this gallery, with the Centre Room obviously placed in the centre. Question: The Principle Corridor features which type of doors?
[EX A]: mirrored doors

[EX Q]: Passage: The Russians sent a fleet to Sinop in northern Anatolia. In the Battle of Sinop on 30 November 1853 they destroyed a patrol squadron of Ottoman frigates and corvettes while they were anchored in port. Public opinion in the UK and France was outraged and demanded war. Sinop provided the United Kingdom and France with the casus belli ("cause for war") for declaring war against Russia. On 28 March 1854, after Russia ignored an Anglo-French ultimatum to withdraw from the Danubian Principalities, the UK and France formally declared war. Question: While anchored in the port, what did the Russians destroy?
[EX A]: a patrol squadron of Ottoman frigates and corvettes

[EX Q]: Passage: British Prime Minister William Pitt's focus on the colonies for the 1758 campaign paid off with the taking of Louisbourg after French reinforcements were blocked by British naval victory in the Battle of Cartagena and in the successful capture of Fort Duquesne and Fort Frontenac. The British also continued the process of deporting the Acadian population with a wave of major operations against Ile Saint-Jean (present-day Prince Edward Island), the St. John River valley, and the Petitcodiac River valley. The celebration of these successes was dampened by their embarrassing defeat in the Battle of Carillon (Ticonderoga), in which 4,000 French troops repulsed 16,000 British. Question: How did the British assure numerical superiority in taking Louisbourg?
[EX A]:
French reinforcements were blocked by British naval victory in the Battle of Cartagena