Problem: Please answer a question about the following article about Treaty:
Reservations are essentially caveats to a state's acceptance of a treaty. Reservations are unilateral statements purporting to exclude or to modify the legal obligation and its effects on the reserving state. These must be included at the time of signing or ratification, i.e. "a party cannot add a reservation after it has already joined a treaty".
When must reservations be included in a treaty?
A: at the time of signing or ratification

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In Western Europe, some of the older Roman elite families died out while others became more involved with Church than secular affairs. Values attached to Latin scholarship and education mostly disappeared, and while literacy remained important, it became a practical skill rather than a sign of elite status. In the 4th century, Jerome (d. 420) dreamed that God rebuked him for spending more time reading Cicero than the Bible. By the 6th century, Gregory of Tours (d. 594) had a similar dream, but instead of being chastised for reading Cicero, he was chastised for learning shorthand. By the late 6th century, the principal means of religious instruction in the Church had become music and art rather than the book. Most intellectual efforts went towards imitating classical scholarship, but some original works were created, along with now-lost oral compositions. The writings of Sidonius Apollinaris (d. 489), Cassiodorus (d. c. 585), and Boethius (d. c. 525) were typical of the age.

When was the death of Sidonius Apollinaris?
Answer: 489

Problem: In the constituent legislature or convention, the conservative and liberal elements formed using the nicknames of Chirrines and Cuchas. The military entered as a third party. The elections for the first regular legislature were disputed, and it was not until May 1, 1826, that the body was installed. The liberals gained control and the opposition responded by fomenting a conspiracy. This was promptly stopped with the aid of informers, and more strenuous measures were taken against the conservatives. Extra powers were conferred on the Durango governor, Santiago Baca Ortiz, deputy to the first national congress, and leader of the liberal party.
Which party had gained control?
The answer is the following: liberals

Madonna released the Material Girl clothing line, which she designed with her daughter, Lourdes. The 1980s inspired clothing line, borrowed from Madonna's punk-girl style when she rose to fame in the 1980s, was released under the Macy's label. Madonna also opened a series of fitness centers around the world named Hard Candy Fitness. In November 2011, Madonna and MG Icon announced the release of a second fashion brand called Truth or Dare by Madonna to include footwear, underclothing, and accessories. She also directed her second feature film, W.E., a biographic about the affair between King Edward VIII and Wallis Simpson; it was co-written with Alek Keshishian. Critical and commercial response to the film was negative. Madonna contributed the ballad "Masterpiece" for the film's soundtrack, which won her a Golden Globe Award for Best Original Song.
What is the name of the clothing line Madonna released with her daughter?
Material Girl

Input: San Diego
In July 2013, three former supporters of Mayor Bob Filner asked him to resign because of allegations of repeated sexual harassment. Over the ensuing six weeks, 18 women came forward to publicly claim that Filner had sexually harassed them, and multiple individuals and groups called for him to resign. On August 19 Filner and city representatives entered a mediation process, as a result of which Filner agreed to resign, effective August 30, 2013, while the city agreed to limit his legal and financial exposure. Filner subsequently pleaded guilty to one felony count of false imprisonment and two misdemeanor battery charges, and was sentenced to house arrest and probation.

How many women claimed to be sexually harassed by Filner?
Output: 18

Problem: Please answer a question about the following article about Railway electrification system:
Railways must operate at variable speeds. Until the mid 1980s this was only practical with the brush-type DC motor, although such DC can be supplied from an AC catenary via on-board electric power conversion. Since such conversion was not well developed in the late 19th century and early 20th century, most early electrified railways used DC and many still do, particularly rapid transit (subways) and trams. Speed was controlled by connecting the traction motors in various series-parallel combinations, by varying the traction motors' fields, and by inserting and removing starting resistances to limit motor current.
What are two types of railway transportation still use DC motor?
A:
rapid transit (subways) and trams