Problem: With his health continuing to deteriorate, the Black Prince returned to England in January 1371, whereby now his father Edward III was elderly and also in poor health. The prince's illness was debilitating, and he died on 8 June 1376. Edward III died the following year on 21 June 1377; he was succeeded by the Black Prince's second son Richard II , who was still a child. The treaty at Brétigny left Edward III and England with enlarged holdings in France; however, a small professional French army under the leadership of du Guesclin pushed the English back and, by the time of Charles V's death in 1380, the English only held Calais and a few other coastal cities. It was usual to appoint a regent in the case of a child monarch, but no regent was appointed for Richard II, who nominally exercised the power of kingship from the date of his accession in 1377. However, between 1377 and 1380, actual power was in the hands of a series of councils. The political community preferred this to a regency led by the king's uncle, John of Gaunt, although Gaunt remained highly influential. Richard faced many challenges during his reign, including the Peasants' Revolt led by Wat Tyler in 1381 and an Anglo-Scottish war in 1384-1385. His attempts to raise taxes to pay for his Scottish adventure and for the protection of Calais against the French made him increasingly unpopular.
Answer this question based on the article: How many years after returning to England did the Black Prince die?
A: 5

Problem: According to the Stockholm International Peace Research Institute, between 2005-2009 and 2010-2014, Russian exports of major weapons increased by 37 percent; Russia spent $66.4 billion on arms in 2015, then $69.2 billion in 2016, having taken 3rd place (after the U.S. and China).  According to the Russian Defence Ministry, share of modern weapons in the Armed Forces reached from 26 to 48 percent among different kinds of troops in December 2014. This was raised to 30.5–70.7% as of July 2015. The average was 58 per cent over the first half of 2017.
Answer this question based on the article: What year did Russia spend more on arms, 2015 or 2016?
A: 

Problem: After the Gulf War, Bahrain received additional military support from the United States, including the sale of 54 M60A3 tanks, 12 F-16C/D aircraft, and 14 Cobra helicopters. Joint naval, air and ground exercises also have been planned and executed to increase readiness throughout the Persian Gulf. Bahrain and the United States signed a Defense Cooperation Agreement in October 1991, granting U.S. forces access to Bahraini facilities and ensuring the right to pre-position material for future crises. In 2003, George W. Bush designated Bahrain as a major non-NATO ally of the United States. Since 2003, Bahrain has been granted over $100 million in Foreign Military Funding to pay for various high-profile weapons systems, to include an AN/TPS-593B Early Warning Radar, Large Aircraft Infrared Countermeasures , Air-to-Air Missile Avoidance System for the King's Plane , as well as an Avenger Air Defense Vehicle.
Answer this question based on the article: How many more tanks than aircraft were sold to Bahrain after the Gulf War?
A:
42