Problem: At Live Aid, held at Wembley on 13 July 1985, in front of the biggest-ever TV audience of 1.9 billion, Queen performed some of their greatest hits, during which the sold-out stadium audience of 72,000 people clapped, sang, and swayed in unison. The show's organisers, Bob Geldof and Midge Ure, other musicians such as Elton John, Cliff Richard and Dave Grohl, and music journalists writing for the BBC, CNN, Rolling Stone, MTV, The Telegraph among others, stated that Queen stole the show. An industry poll in 2005 ranked it the greatest rock performance of all time. Mercury's powerful, sustained note during the a cappella section came to be known as "The Note Heard Round the World".
How long was Live Aid's stadium audience?
The answer is the following: 72,000


Cultural and career issues in the U.S. Air Force have been cited as one of the reasons for the shortfall in needed UAV operators. In spite of an urgent need for UAVs or drones to provide round the clock coverage for American troops during the Iraq War, the USAF did not establish a new career field for piloting them until the last year of that war and in 2014 changed its RPA training syllabus again, in the face of large aircraft losses in training, and in response to a GAO report critical of handling of drone programs. Paul Scharre has reported that the cultural divide between the USAF and US Army has kept both services from adopting each other's drone handing innovations.
What branch of the US Military does a cultural divide prevent the US Air Force from adopting their drone protocols?
US Army


Input: 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.

What switches the input of most DC motors?
Output: commutator


Input: Article: Between 2000 and 2004 an average of 478 crimes were reported each day in Mexico City; however, the actual crime rate is thought to be much higher "since most people are reluctant to report crime". Under policies enacted by Mayor Marcelo Ebrard between 2009 and 2011, Mexico City underwent a major security upgrade with violent and petty crime rates both falling significantly despite the rise in violent crime in other parts of the country. Some of the policies enacted included the installation of 11,000 security cameras around the city and a very large expansion of the police force. Mexico City has one of the world's highest police officer-to-resident ratios, with one uniformed officer per 100 citizens.

Now answer this question: What Mexican mayor tried to crack down on crime immensely? 

Output: Marcelo Ebrard


Article: Many groups continued their hunter-gatherer ways of life, although their numbers have continually declined, partly as a result of pressure from growing agricultural and pastoral communities. Many of them reside in the developing world, either in arid regions or tropical forests. Areas that were formerly available to hunter-gatherers were—and continue to be—encroached upon by the settlements of agriculturalists. In the resulting competition for land use, hunter-gatherer societies either adopted these practices or moved to other areas. In addition, Jared Diamond has blamed a decline in the availability of wild foods, particularly animal resources. In North and South America, for example, most large mammal species had gone extinct by the end of the Pleistocene—according to Diamond, because of overexploitation by humans, although the overkill hypothesis he advocates is strongly contested.[by whom?]

Question: What has Jared Diamond blamed the decline of gatherers on?
Ans: availability of wild foods


Input: Saint Helena
In 1815, the British government selected Saint Helena as the place of detention of Napoleon Bonaparte. He was taken to the island in October 1815. Napoleon stayed at the Briars pavilion on the grounds of the Balcombe family's home until his permanent residence, Longwood House, was completed in December 1815. Napoleon died there on 5 May 1821.

What year did Napoleon Bonaparte pass away?
Output:
1821