Problem: In 677 (during the reign of Emperor Gaozong), Chen Zheng (陳政), together with his son Chen Yuanguang (陳元光), led a military expedition to pacify the rebellion in Fujian. They settled in Zhangzhou and brought the Middle Chinese phonology of northern China during the 7th century into Zhangzhou; In 885, (during the reign of Emperor Xizong of Tang), the two brothers Wang Chao (王潮) and Wang Shenzhi (王審知), led a military expedition force to pacify the Huang Chao rebellion. They brought the Middle Chinese phonology commonly spoken in Northern China into Zhangzhou. These two waves of migrations from the north generally brought the language of northern Middle Chinese into the Fujian region. This then gradually evolved into the Zhangzhou dialect.
Who was the ruler of China in 677?
The answer is the following: Emperor Gaozong

Problem: Lossless data compression algorithms usually exploit statistical redundancy to represent data without losing any information, so that the process is reversible. Lossless compression is possible because most real-world data exhibits statistical redundancy. For example, an image may have areas of colour that do not change over several pixels; instead of coding "red pixel, red pixel, ..." the data may be encoded as "279 red pixels". This is a basic example of run-length encoding; there are many schemes to reduce file size by eliminating redundancy.
What may have colors that do not change over several pixels?
The answer is the following: an image

Problem: Nominally, sovereignty lay in the emperor but in fact power was wielded by the Fujiwara nobility. However, to protect their interests in the provinces, the Fujiwara and other noble families required guards, police and soldiers. The warrior class made steady political gains throughout the Heian period. As early as 939 A.D, Taira no Masakado threatened the authority of the central government, leading an uprising in the eastern province of Hitachi, and almost simultaneously, Fujiwara no Sumitomo rebelled in the west. Still, a true military takeover of the Japanese government was centuries away, when much of the strength of the government would lie within the private armies of the shogunate.
What noble family wielded power during the Heian period?
The answer is the following: Fujiwara

Problem: Christianity (59%), particularly Catholicism (33%), was the most prevalently practiced religion in New York as of 2014, followed by Judaism, with approximately 1.1 million Jews in New York City, over half living in Brooklyn. Islam ranks third in New York City, with official estimates ranging between 600,000 and 1,000,000 observers and including 10% of the city's public schoolchildren, followed by Hinduism, Buddhism, and a variety of other religions, as well as atheism. In 2014, 24% self-identified with no organized religious affiliation.
What is the third most popular faith in New York City?
The answer is the following:
Islam