Input: List of numbered streets in Manhattan
155th Street is a major crosstown street considered to form the boundary between Harlem and Washington Heights. It is the northernmost of the 155 crosstown streets mapped out in the Commissioner's Plan of 1811 that established the numbered street grid in Manhattan.

What document established Manhattan's numbered street grid?
Output: Commissioner's Plan of 1811

Input: Article: Psychoactive drugs can impair the judgment of time. Stimulants can lead both humans and rats to overestimate time intervals, while depressants can have the opposite effect. The level of activity in the brain of neurotransmitters such as dopamine and norepinephrine may be the reason for this. Such chemicals will either excite or inhibit the firing of neurons in the brain, with a greater firing rate allowing the brain to register the occurrence of more events within a given interval (speed up time) and a decreased firing rate reducing the brain's capacity to distinguish events occurring within a given interval (slow down time).

Now answer this question: Stimulants lead humans to overestimate what?

Output: time intervals

Article: Christianity was a major unifying factor between Eastern and Western Europe before the Arab conquests, but the conquest of North Africa sundered maritime connections between those areas. Increasingly the Byzantine Church differed in language, practices, and liturgy from the western Church. The eastern church used Greek instead of the western Latin. Theological and political differences emerged, and by the early and middle 8th century issues such as iconoclasm, clerical marriage, and state control of the church had widened to the extent that the cultural and religious differences were greater than the similarities. The formal break came in 1054, when the papacy and the patriarchy of Constantinople clashed over papal supremacy and excommunicated each other, which led to the division of Christianity into two churchesthe western branch became the Roman Catholic Church and the eastern branch the Orthodox Church.

Question: When did the eastern and western churches split?
Ans: 1054

Here is a question about this article: The cultural role of copper has been important, particularly in currency. Romans in the 6th through 3rd centuries BC used copper lumps as money. At first, the copper itself was valued, but gradually the shape and look of the copper became more important. Julius Caesar had his own coins made from brass, while Octavianus Augustus Caesar's coins were made from Cu-Pb-Sn alloys. With an estimated annual output of around 15,000 t, Roman copper mining and smelting activities reached a scale unsurpassed until the time of the Industrial Revolution; the provinces most intensely mined were those of Hispania, Cyprus and in Central Europe.
What is the answer to this question: Cctavianus Augustus Caesar had his coins made out of what alloys?
****
So... Cu-Pb-Sn alloys

The problem: Answer a question about this article:
To promote culture Utrecht city organizes cultural Sundays. During a thematic Sunday several organisations create a program, which is open to everyone without, or with a very much reduced, admission fee. There are also initiatives for amateur artists. The city subsidises an organisation for amateur education in arts aimed at all inhabitants (Utrechts Centrum voor de Kunsten), as does the university for its staff and students. Additionally there are also several private initiatives. The city council provides coupons for discounts to inhabitants who receive welfare to be used with many of the initiatives.
What happens on Cultural Sunday
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The answer: thematic Sunday several organisations create a program, which is open to everyone without, or with a very much reduced, admission fee

The problem: Answer a question about this article:
Of much greater importance is the division of the city into 62 barrios: neighbourhoods or wards. Many of the city's barriossuch as Sayago, Ituzaingo and Pocitoswere previously geographically separate settlements, later absorbed by the growth of the city. Others grew up around certain industrial sites, including the salt-curing works of Villa del Cerro and the tanneries in Nuevo Paris. Each barrio has its own identity, geographic location and socio-cultural activities. A neighbourhood of great significance is Ciudad Vieja, that was surrounded by a protective wall until 1829. This area contains most important buildings of the colonial era and early decades of independence.
What had many of the city's barrios previously been?
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The answer:
geographically separate settlements