Problem: John von Neumann:

Von Neumann founded the field of continuous geometry. It followed his path-breaking work on rings of operators. In mathematics, continuous geometry is an analogue of complex projective geometry, where instead of the dimension of a subspace being in a discrete set 0, 1, ..., n, it can be an element of the unit interval [0,1]. Von Neumann was motivated by his discovery of von Neumann algebras with a dimension function taking a continuous range of dimensions, and the first example of a continuous geometry other than projective space was the projections of the hyperfinite type II factor.

What was the first example of continuous geometry?
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A: projections of the hyperfinite type II factor

Problem: Franco-Prussian War:

At the Battle of Mars-la-Tours, the Prussian 12th Cavalry Brigade, commanded by General Adalbert von Bredow, conducted a charge against a French artillery battery. The attack was a costly success and came to be known as "von Bredow's Death Ride", which was held to prove that cavalry charges could still prevail on the battlefield. Use of traditional cavalry on the battlefields of 1914 proved to be disastrous, due to accurate, long-range rifle fire, machine-guns and artillery. Von Bredow's attack had succeeded only because of an unusually effective artillery bombardment just before the charge, along with favorable terrain that masked his approach.

What military tactic proved to be unsuccessful on the 1914 battlefields?
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A: Use of traditional cavalry

Problem: Arsenal F.C.:

In 1886, Woolwich munitions workers founded the club as Dial Square. In 1913, the club crossed the city to Arsenal Stadium in Highbury. They became Tottenham Hotspur's nearest club, commencing the North London derby. In 2006, they moved to the Emirates Stadium in nearby Holloway. Arsenal earned 435.5m in 201415, with the Emirates Stadium generating the highest revenue in world football. Based on social media activity from 201415, Arsenal's fanbase is the fifth largest in the world. Forbes estimates the club was worth $1.3 billion in 2015.

When was Arsenal originally formed?
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A: 1886

Problem: Molotov%E2%80%93Ribbentrop Pact:

On 1 September, Germany invaded Poland from the west. Within the first few days of the invasion, Germany began conducting massacres of Polish and Jewish civilians and POWs. These executions took place in over 30 towns and villages in the first month of German occupation. The Luftwaffe also took part by strafing fleeing civilian refugees on roads and carrying out a bombing campaign. The Soviet Union assisted German air forces by allowing them to use signals broadcast by the Soviet radio station at Minsk allegedly "for urgent aeronautical experiments".

How didn't the Russians communicate to the Germans in regards to bombing civilians trying to flee cities?
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A:
unanswerable