Problem: Han dynasty:

The period between the foundation of the Han dynasty and Wang Mang's reign is known as the Western Han dynasty (simplified Chinese: ; traditional Chinese: ; pinyin: Xi Han) or Former Han dynasty (simplified Chinese: ; traditional Chinese: ; pinyin: Qianhan) (206 BC 9 AD). During this period the capital was at Chang'an (modern Xi'an). From the reign of Guangwu the capital was moved eastward to Luoyang. The era from his reign until the fall of Han is known as the Eastern Han dynasty (simplified Chinese: ; traditional Chinese: ; pinyin: Dong Han) or the Later Han dynasty (simplified Chinese: ; traditional Chinese: ; pinyin: Hou Han) (25220 AD).

What era does the reign of Guangwu fall under?
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A: Eastern Han dynasty

Problem: The 1903 advent of heavier-than-air fixed-wing aircraft was closely followed in 1910 by the first experimental take-off of an airplane, made from the deck of a United States Navy vessel (cruiser USS Birmingham), and the first experimental landings were conducted in 1911. On 9 May 1912 the first airplane take-off from a ship underway was made from the deck of the British Royal Navy's HMS Hibernia. Seaplane tender support ships came next, with the French Foudre of 1911. In September 1914 the Imperial Japanese Navy Wakamiya conducted the world's first successful ship-launched air raid: on 6 September 1914 a Farman aircraft launched by Wakamiya attacked the Austro-Hungarian cruiser SMS Kaiserin Elisabeth and the German gunboat Jaguar in Kiaochow Bay off Tsingtao; neither was hit. The first carrier-launched airstrike was the Tondern Raid in July 1918. Seven Sopwith Camels launched from the converted battlecruiser HMS Furious damaged the German airbase at Tnder and destroyed two zeppelins.
In what year were the first experimental takeoffs of an airplane?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Subjective Idealism (immaterialism or phenomenalism) describes a relationship between experience and the world in which objects are no more than collections or "bundles" of sense data in the perceiver. Proponents include Berkeley, Bishop of Cloyne, an Anglo-Irish philosopher who advanced a theory he called immaterialism, later referred to as "subjective idealism", contending that individuals can only know sensations and ideas of objects directly, not abstractions such as "matter", and that ideas also depend upon being perceived for their very existence - esse est percipi; "to be is to be perceived".
What philosophies run counter to subjective idealism?
A: unanswerable

Context and question: Multiracial Americans are Americans who have mixed ancestry of "two or more races". The term may also include Americans of mixed-race ancestry who self-identify with just one group culturally and socially (cf. the one-drop rule). In the 2010 US census, approximately 9 million individuals, or 2.9% of the population, self-identified as multiracial. There is evidence that an accounting by genetic ancestry would produce a higher number, but people live according to social and cultural identities, not DNA. Historical reasons, including slavery creating a racial caste and the European-American suppression of Native Americans, often led people to identify or be classified by only one ethnicity, generally that of the culture in which they were raised. Prior to the mid-20th century, many people hid their multiracial heritage because of racial discrimination against minorities. While many Americans may be biologically multiracial, they often do not know it or do not identify so culturally, any more than they maintain all the differing traditions of a variety of national ancestries.
Which cultural do multicultural people usually identify with?
Answer: , generally that of the culture in which they were raised.

Question: Of approximately 100 million native speakers of German in the world, roughly 80 million consider themselves Germans.[citation needed] There are an additional 80 million people of German ancestry mainly in the United States, Brazil (mainly in the South Region of the country), Argentina, Canada, South Africa, the post-Soviet states (mainly in Russia and Kazakhstan), and France, each accounting for at least 1 million.[note 2] Thus, the total number of Germans lies somewhere between 100 and more than 150 million, depending on the criteria applied (native speakers, single-ancestry ethnic Germans, partial German ancestry, etc.).
Is there an answer to this question: How many people in the world claim to be from German ancestry?

Answer: 100 and more than 150 million

Problem: Federalism:

Federalism, and other forms of territorially autonomy, is generally seen as a useful way to structure political systems in order prevent violence among different groups with countries because it allows certain groups to legislate at the subnational level. Some scholars have suggested, however, that federalism can divide countries and result in state collapse because it creates proto-states. Still others have shown that federalism is only divisive when it lacks mechanisms tthat encourage political parties to compete across regional boundaries.

What is communism seen as?
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A:
unanswerable