Problem: Please answer a question about the following article about Bern:
Bern has a population of 140,634 people and 34% of the population are resident foreign nationals. Over the 10 years between 2000 and 2010, the population changed at a rate of 0.6%. Migration accounted for 1.3%, while births and deaths accounted for −2.1%.
What counted for more of the population change?
A: births and deaths
Problem: Please answer a question about the following article about Kanye West:
West has been an outspoken and controversial celebrity throughout his career, receiving both criticism and praise from many, including the mainstream media, other artists and entertainers, and two U.S. presidents. On September 2, 2005, during a benefit concert for Hurricane Katrina relief on NBC, A Concert for Hurricane Relief, West (a featured speaker) accused President George W. Bush of not "car[ing] about black people". When West was presenting alongside actor Mike Myers, he deviated from the prepared script to criticize the media's portrayal of hurricane victims, saying:
On what day did the Kanye's famous George W. Bush criticism take place?
A: September 2, 2005
Problem: Please answer a question about the following article about Electric motor:
A commutator is a mechanism used to switch the input of most DC machines and certain AC machines consisting of slip ring segments insulated from each other and from the electric motor's shaft. The motor's armature current is supplied through the stationary brushes in contact with the revolving commutator, which causes required current reversal and applies power to the machine in an optimal manner as the rotor rotates from pole to pole. In absence of such current reversal, the motor would brake to a stop. In light of significant advances in the past few decades due to improved technologies in electronic controller, sensorless control, induction motor, and permanent magnet motor fields, electromechanically commutated motors are increasingly being displaced by externally commutated induction and permanent-magnet motors.
From where is current to the motor supplied?
A: stationary brushes
Problem: Please answer a question about the following article about Nanjing:
Nanjing first became a state capital in 229 AD, when the state of Eastern Wu founded by Sun Quan during the Three Kingdoms period relocated its capital to Jianye (建業), the city extended on the basis of Jinling Yi in 211 AD. Although conquered by the Western Jin dynasty in 280, Nanjing and its neighbouring areas had been well cultivated and developed into one of the commercial, cultural and political centers of China during the rule of East Wu. This city would soon play a vital role in the following centuries.
When did Nanjing become a state capital?
A:
229 AD