Problem: Please answer a question about the following article about London:
London has numerous venues for rock and pop concerts, including the world's busiest arena the o2 arena and other large arenas such as Earls Court, Wembley Arena, as well as many mid-sized venues, such as Brixton Academy, the Hammersmith Apollo and the Shepherd's Bush Empire. Several music festivals, including the Wireless Festival, South West Four, Lovebox, and Hyde Park's British Summer Time are all held in London. The city is home to the first and original Hard Rock Cafe and the Abbey Road Studios where The Beatles recorded many of their hits. In the 1960s, 1970s and 1980s, musicians and groups like Elton John, Pink Floyd, David Bowie, Queen, The Kinks, The Rolling Stones, The Who, Eric Clapton, Led Zeppelin, The Small Faces, Iron Maiden, Fleetwood Mac, Elvis Costello, Cat Stevens, The Police, The Cure, Madness, The Jam, Dusty Springfield, Phil Collins, Rod Stewart and Sade, derived their sound from the streets and rhythms vibrating through London.
Located in London, what is the busiest concert arena in the world?
A: the o2 arena
Problem: Please answer a question about the following article about Alloy:
In 1906, precipitation hardening alloys were discovered by Alfred Wilm. Precipitation hardening alloys, such as certain alloys of aluminium, titanium, and copper, are heat-treatable alloys that soften when quenched (cooled quickly), and then harden over time. After quenching a ternary alloy of aluminium, copper, and magnesium, Wilm discovered that the alloy increased in hardness when left to age at room temperature. Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first "age hardening" alloys to be used, and was soon followed by many others. Because they often exhibit a combination of high strength and low weight, these alloys became widely used in many forms of industry, including the construction of modern aircraft.
One of the first "age hardening" alloys used were called?
A: duralumin
Problem: Please answer a question about the following article about Han dynasty:
Various cases for rape, physical abuse and murder were prosecuted in court. Women, although usually having fewer rights by custom, were allowed to level civil and criminal charges against men. While suspects were jailed, convicted criminals were never imprisoned. Instead, punishments were commonly monetary fines, periods of forced hard labor for convicts, and the penalty of death by beheading. Early Han punishments of torturous mutilation were borrowed from Qin law. A series of reforms abolished mutilation punishments with progressively less-severe beatings by the bastinado.
What did women commonly have less of?
A: rights
Problem: Please answer a question about the following article about Department store:
The Paris department store had its roots in the magasin de nouveautés, or novelty store; the first, the Tapis Rouge, was created in 1784. They flourished in the early 19th century, with La Belle Jardiniere (1824), Aux Trois Quartiers (1829), and Le Petit Saint Thomas (1830). Balzac described their functioning in his novel César Birotteau. In the 1840s, with the arrival of the railroads in Paris and the increased number of shoppers they brought, they grew in size, and began to have large plate glass display windows, fixed prices and price tags, and advertising in newspapers.
What were the origins of the Paris department store? 
A:
magasin de nouveautés