Article: Proto-Iranian thus dates to some time after Proto-Indo-Iranian break-up, or the early second millennium BCE, as the Old Iranian languages began to break off and evolve separately as the various Iranian tribes migrated and settled in vast areas of southeastern Europe, the Iranian plateau, and Central Asia.

Question: Where did early Iranian people establish societies?
Ans: southeastern Europe, the Iranian plateau, and Central Asia

Article: In recent Mercer's 2015 annual quality-of-living survey, New Delhi ranks at number 154 out of 230 cities due to bad air quality and pollution. The World Health Organization ranked New Delhi as the world's worst polluted city in 2014 among about 1,600 cities the organization tracked around the world.

Question: What is the main cause of New Delhi's relatively low ranking in Mercer's quality of life survey?
Ans: bad air quality and pollution

Article: Political science is a late arrival in terms of social sciences[citation needed]. However, the discipline has a clear set of antecedents such as moral philosophy, political philosophy, political economy, history, and other fields concerned with normative determinations of what ought to be and with deducing the characteristics and functions of the ideal form of government. The roots of politics are in prehistory. In each historic period and in almost every geographic area, we can find someone studying politics and increasing political understanding.

Question: What larger group does political science belong to?
Ans: social sciences

Article: The compression works by reducing the accuracy of certain parts of a sound that are considered to be beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, and then records the remaining information in an efficient manner.

Question: What does the compression target in the song?
Ans:
accuracy