In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

[Q]: Passage: Britain's declaration of war against Nazi Germany in September 1939 included the Crown colonies and India but did not automatically commit the Dominions of Australia, Canada, New Zealand, Newfoundland and South Africa. All soon declared war on Germany, but Ireland chose to remain legally neutral throughout the war.After the Fall of France in June 1940, Britain and the empire stood alone against Germany, until the German invasion of Greece on 7 April 1941. British Prime Minister Winston Churchill successfully lobbied President Franklin D. Roosevelt for military aid from the United States, but Roosevelt was not yet ready to ask Congress to commit the country to war. In August 1941, Churchill and Roosevelt met and signed the Atlantic Charter, which included the statement that "the rights of all peoples to choose the form of government under which they live" should be respected. This wording was ambiguous as to whether it referred to European countries invaded by Germany and Italy, or the peoples colonised by European nations, and would later be interpreted differently by the British, Americans, and nationalist movements.In December 1941, Japan launched, in quick succession, attacks on British Malaya, the United States naval base at Pearl Harbor, and Hong Kong. Churchill's reaction to the entry of the United States into the war was that Britain was now assured of victory and the future of the empire was safe, but the manner in which British forces were rapidly defeated in the Far East irreversibly harmed Britain's standing and prestige as an imperial power. Most damaging of all was the Fall of Singapore, which had previously been hailed as an impregnable fortress and the eastern equivalent of Gibraltar. The realisation that Britain could not defend its entire empire pushed Australia and New Zealand, which now appeared threatened by Japanese forces, into closer ties with the United States. This resulted in the 1951 ANZUS Pact between Australia, New Zealand and the United States of America. 
Question: What location was the city that was seen as impregnable fortress considered to be the eastern equivalent of?
[A]: Gibraltar.


[Q]: Passage: Following the Seven Years' War (1756–63) and the forced migration of Native American tribes westward, German, Scots-Irish, and other European immigrants settled in the central Susquehanna Valley, including in the area that would become Northumberland, Pennsylvania. Northumberland was laid out around a central village green in 1772, on land originally purchased from the Iroquois by the Province of Pennsylvania in 1768, as part of the first Treaty of Fort Stanwix. During the American Revolution, the village was evacuated as part of the Big Runaway in 1778, and only finally resettled in 1784. In 1794, when the Priestleys moved there, it included Quaker and Wesleyan meeting houses, a brewery, two potteries, a potash manufacturer, a clock maker, a printer (who issued a weekly newspaper), several stores, and approximately one hundred houses.
The Priestley property, purchased in 1794 at a total cost of £500 (£ 56,400 in 2019) from Reuben Haines, who had secured the patent to the land for Northumberland, comprised four lots of the original village plan (numbers 29–32). Currently, the house and grounds occupy 1 acre (4,000 m²) at 472 Priestley Avenue. (The address of the house was originally "North Way", but the street was later renamed in honor of Joseph Priestley.) This street forms the northwest boundary of the property; the other boundaries are Hanover Avenue to the northeast, Wallis Street to the southwest, and the North Shore Railroad to the southeast. Beyond the railroad line is a baseball field, and beyond that lies the Susquehanna River, which was the original southeastern boundary of the property. The confluence of the West Branch Susquehanna River with the main (or North) branch of the Susquehanna is a short distance southwest of the property, which is at an elevation of 456 feet (139 m).The property's original area was 2 acres (8,000 m²), but this was reduced by about half around 1830 when the Pennsylvania Canal (North Branch Division) was dug through the house's front yard, between the house and river. On May 31, 1860, the Lackawanna and Bloomsburg Railroad opened with a train from Danville. This was the second railroad track in Northumberland, and ran behind the house. The canal closed in 1902 and was later filled in. The modern railroad line approximates the canal's course through the front yard; the track behind the house no longer exists. 
Question: What was reduced from 2 acres to 1 when the Pennsylvania Canal was dug?
[A]: The Priestley property.


[Q]: Passage: "Don't Stop the Music" is a song recorded by Barbadian singer Rihanna for her third studio album, Good Girl Gone Bad (2007). It was released worldwide on September 7, 2007, as the fourth single of the album. The song was written by Tawanna Dabney and its producers StarGate; Michael Jackson also received a songwriting credit for the sampling of the line "Mama-say, mama-sa, ma-ma-ko-ssa" from Jackson's 1983 single "Wanna Be Startin' Somethin'". Both Rihanna and Jackson were sued by Cameroonian musician Manu Dibango, who asserted that the hook originated in his 1972 song "Soul Makossa". "Don't Stop the Music" is a dance track that features rhythmic devices used primarily in hip hop music.
Many music journalists praised the sampling of the "Mama-say, mama-sa, ma-ma-ko-ssa" hook. The song received a number of accolades, including a Grammy Award nomination for Best Dance Recording. "Don't Stop the Music" reached number one in nine countries, including Australia, France, Germany, and Switzerland. Reaching number four on the UK Singles Chart, it was certified gold by the British Phonographic Industry (BPI). The single peaked at number three on the US Billboard Hot 100 and number one on the US Billboard Dance Club Songs charts. Certified four times platinum by the Recording Industry Association of America (RIAA), it has sold more than 3.7 million copies in the US.
Anthony Mandler filmed the song's music video in Prague. In the video, Rihanna and her friends sneak into the back of a candy store that contains a secret club, and she parties with club-goers. The singer performed "Don't Stop the Music" at the 50th Annual Grammy Awards and the NRJ Music Awards in 2008, and included it on her Good Girl Gone Bad, Last Girl on Earth, Loud and Diamonds World Tour set lists. The American Society of Composers, Authors, and Publishers (ASCAP) recognized it as one of the most-performed songs of 2009. English recording artist Jamie Cullum released a cover of the song as the second single from his 2009 album The Pursuit, and his version charted in several European countries. 
Question: What city was the video for Don't Stop the Music filmed in?
[A]:
Prague.