Problem: New York City:

Under New York State's gradual abolition act of 1799, children of slave mothers were born to be eventually liberated but were held in indentured servitude until their mid-to-late twenties. Together with slaves freed by their masters after the Revolutionary War and escaped slaves, a significant free-black population gradually developed in Manhattan. Under such influential United States founders as Alexander Hamilton and John Jay, the New York Manumission Society worked for abolition and established the African Free School to educate black children. It was not until 1827 that slavery was completely abolished in the state, and free blacks struggled afterward with discrimination. New York interracial abolitionist activism continued; among its leaders were graduates of the African Free School. The city's black population reached more than 16,000 in 1840.

What borough was home to a notable population of free African-Americans?
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A: Manhattan

Problem: Even in modern democracies, Freemasonry is sometimes viewed with distrust. In the UK, Masons working in the justice system, such as judges and police officers, were from 1999 to 2009 required to disclose their membership. While a parliamentary inquiry found that there has been no evidence of wrongdoing, it was felt that any potential loyalties Masons might have, based on their vows to support fellow Masons, should be transparent to the public. The policy of requiring a declaration of masonic membership of applicants for judicial office (judges and magistrates) was ended in 2009 by Justice Secretary Jack Straw (who had initiated the requirement in the 1990s). Straw stated that the rule was considered disproportionate, since no impropriety or malpractice had been shown as a result of judges being Freemasons.
Who ended the English Masonic disclosure policy in 2009?
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Answer: Justice Secretary Jack Straw

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The symbol $, usually written before the numerical amount, is used for the U.S. dollar (as well as for many other currencies). The sign was the result of a late 18th-century evolution of the scribal abbreviation "ps" for the peso, the common name for the Spanish dollars that were in wide circulation in the New World from the 16th to the 19th centuries. These Spanish pesos or dollars were minted in Spanish America, namely in Mexico City, Potosi, Bolivia; and Lima, Peru. The p and the s eventually came to be written over each other giving rise to $.
What was the common name for the Spanish dollar?
A: peso

Context and question: 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".
Who coined the term subjective idealism?
Answer: unanswerable

Question: Although most aspirated obstruents in the world's language are stops and affricates, aspirated fricatives such as [s], [f] or [] have been documented in Korean, in a few Tibeto-Burman languages, in some Oto-Manguean languages, and in the Siouan language Ofo. Some languages, such as Choni Tibetan, have up to four contrastive aspirated fricatives [s] [], [] and [x].
Is there an answer to this question: Choni Tibetan has how many unaspirated fricatives?

Answer: unanswerable

QUES: Leibniz describes a space that exists only as a relation between objects, and which has no existence apart from the existence of those objects. Motion exists only as a relation between those objects. Newtonian space provided the absolute frame of reference within which objects can have motion. In Newton's system, the frame of reference exists independently of the objects contained within it. These objects can be described as moving in relation to space itself. For many centuries, the evidence of a concave water surface held authority.

According to Leibniz, what has no existence apart from the existence of objections?
What is the answer?
ANS:
space