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By 1990, the Census Bureau included more than a dozen ethnic/racial categories on the census, reflecting not only changing social ideas about ethnicity, but the wide variety of immigrants who had come to reside in the United States due to changing historical forces and new immigration laws in the 1960s. With a changing society, more citizens have begun to press for acknowledging multiracial ancestry. The Census Bureau changed its data collection by allowing people to self-identify as more than one ethnicity. Some ethnic groups are concerned about the potential political and economic effects, as federal assistance to historically underserved groups has depended on Census data. According to the Census Bureau, as of 2002, over 75% of all African Americans had multiracial ancestries.

The Census Bureau had gone from two categories to how many by the 1990s?
Answer: more than a dozen

Problem: Ter-Petrosyan led Armenia alongside Defense Minister Vazgen Sargsyan through the Nagorno-Karabakh War with neighboring Azerbaijan. The initial post-Soviet years were marred by economic difficulties, which had their roots early in the Karabakh conflict when the Azerbaijani Popular Front managed to pressure the Azerbaijan SSR to instigate a railway and air blockade against Armenia. This move effectively crippled Armenia's economy as 85% of its cargo and goods arrived through rail traffic. In 1993, Turkey joined the blockade against Armenia in support of Azerbaijan.
What prevented Armenia from getting it's commodities?
The answer is the following: a railway and air blockade

Across London, Black and Asian children outnumber White British children by about six to four in state schools. Altogether at the 2011 census, of London's 1,624,768 population aged 0 to 15, 46.4 per cent were White, 19.8 per cent were Asian, 19 per cent were Black, 10.8 per cent were Mixed and 4 per cent represented another ethnic group. In January 2005, a survey of London's ethnic and religious diversity claimed that there were more than 300 languages spoken in London and more than 50 non-indigenous communities with a population of more than 10,000. Figures from the Office for National Statistics show that, in 2010[update], London's foreign-born population was 2,650,000 (33 per cent), up from 1,630,000 in 1997.
According to the 2011 London census, what percentage of children were black?
19 per cent

Input: Liberia
On April 12, 1980, a military coup led by Master Sergeant Samuel Doe of the Krahn ethnic group overthrew and killed President William R. Tolbert, Jr.. Doe and the other plotters later executed a majority of Tolbert's cabinet and other Americo-Liberian government officials and True Whig Party members. The coup leaders formed the People's Redemption Council (PRC) to govern the country. A strategic Cold War ally of the West, Doe received significant financial backing from the United States while critics condemned the PRC for corruption and political repression.

The coup leaders later became known as?
Output: the People's Redemption Council

Input: Article: Although it is said that the "dog is man's best friend" regarding 1724% of dogs in the developed countries, in the developing world they are feral, village or community dogs, with pet dogs uncommon. These live their lives as scavengers and have never been owned by humans, with one study showing their most common response when approached by strangers was to run away (52%) or respond with aggression (11%). We know little about these dogs, nor about the dogs that live in developed countries that are feral, stray or are in shelters, yet the great majority of modern research on dog cognition has focused on pet dogs living in human homes.

Now answer this question: Dog cognition has been studied on what kind of dogs?

Output: pet dogs living in human homes.

Problem: Through publicly funded emergency relief programs concentrating on agricultural land-improvement projects and road construction, the "Erich Koch Plan" for East Prussia allegedly made the province free of unemployment; on August 16, 1933 Koch reported to Hitler that unemployment had been banished entirely from East Prussia, a feat that gained admiration throughout the Reich. Koch's industrialization plans led him into conflict with R. Walther Darre, who held the office of the Reich Peasant Leader (Reichsbauernfuhrer) and Minister of Agriculture. Darre, a neopaganist rural romantic, wanted to enforce his vision of an agricultural East Prussia. When his "Land" representatives challenged Koch's plans, Koch had them arrested.
What did Koch report to Hitler in 1933?
The answer is the following:
that unemployment had been banished entirely