Problem: Multiracial American:

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.

How many different ethnic categories were listed on the modern census?
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A: By 1990, the Census Bureau included more than a dozen ethnic/racial categories on the census,


Problem: 
XML databases are a type of structured document-oriented database that allows querying based on XML document attributes. XML databases are mostly used in enterprise database management, where XML is being used as the machine-to-machine data interoperability standard. XML database management systems include commercial software MarkLogic and Oracle Berkeley DB XML, and a free use software Clusterpoint Distributed XML/JSON Database. All are enterprise software database platforms and support industry standard ACID-compliant transaction processing with strong database consistency characteristics and high level of database security.
What kind of database is ZML?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
As the European population was severely reduced, land became more plentiful for the survivors, and labour consequently more expensive. Attempts by landowners to forcibly reduce wages, such as the English 1351 Statute of Laborers, were doomed to fail. These efforts resulted in nothing more than fostering resentment among the peasantry, leading to rebellions such as the French Jacquerie in 1358 and the English Peasants' Revolt in 1381. The long-term effect was the virtual end of serfdom in Western Europe. In Eastern Europe, on the other hand, landowners were able to exploit the situation to force the peasantry into even more repressive bondage.
What English law was scrapped in order to forcibly reduce wages?
A: unanswerable


Context and question: On April 15, 2013, two Chechen Islamist brothers exploded two bombs near the finish line of the Boston Marathon, killing three people and injuring roughly 264.
How many fatalities were there at the marathon?
Answer: three


Question: Immanuel Velikovsky is an example of a recent scientific exoheretic; he did not have appropriate scientific credentials or did not publish in scientific journals. While the details of his work are in scientific disrepute, the concept of catastrophic change (extinction event and punctuated equilibrium) has gained acceptance in recent decades.
Is there an answer to this question: Who's work is widely excepted among scientest today?

Answer: unanswerable


QUES: General Bonaparte and his expedition eluded pursuit by the Royal Navy and landed at Alexandria on 1 July. He fought the Battle of Shubra Khit against the Mamluks, Egypt's ruling military caste. This helped the French practice their defensive tactic for the Battle of the Pyramids, fought on 21 July, about 24 km (15 mi) from the pyramids. General Bonaparte's forces of 25,000 roughly equalled those of the Mamluks' Egyptian cavalry. Twenty-nine French and approximately 2,000 Egyptians were killed. The victory boosted the morale of the French army.

What battle did Napoleon fight against the Mamluks?
What is the answer?
ANS:
the Battle of Shubra Khit