Problem: In North America, the National Association of Theatre Owners (NATO) is the largest exhibition trade organization in the world. According to their figures, the top four chains represent almost half of the theater screens in North America. In Canada, Cineplex Entertainment is the largest and movie theater company with 161 locations and 1,635 screens. The studios once controlled many theaters, but after the appearance of Mr. Smith Goes to Washington, Congress passed the Matthew Neely Anti-Block Booking Act, which eventually broke the link between the studios and the theaters. Now, the top three chains in the U.S. are Regal Entertainment Group, AMC Entertainment Inc and Cinemark Theatres. In 1995, Carmike was the largest chain in the United States- now, the major chains include AMC Entertainment Inc - 5,206 screens in 346 theaters, Cinemark Theatres - 4,457 screens in 334 theaters, Landmark Theatres - 220 screens in 54 theaters, Marcus Theatres - 681 screens in 53 theaters. National Amusements - 409 screens in 32 theaters and Regal Entertainment Group - 7,334 screens in 588 cinemas. In 2015 the United States had a total of 40,547 screens. In Mexico, the major chains are Cinepolis and Cinemex.
Answer this question based on the article: How many more screens are located in the US compared to Canada?
A: 38912

Problem: From a 1988 study in China, the US protection agency quantified the lifetime exposure of arsenic in drinking water at concentrations of 0.0017 mg/L (1.7 ppb), 0.00017 mg/L, and 0.000017 mg/L are associated with a lifetime skin cancer risk of 1 in 10,000, 1 in 100,000, and 1 in 1,000,000 respectively. WHO asserts that a water level of 0.01 mg/L (10 ppb) poses a risk of 6 in 10000 chance of lifetime skin cancer risk and contends that this level of risk is acceptable.
Answer this question based on the article: According to the passage, which substance may pose a risk of skin cancer?
A: arsenic

Problem: By September 1545, the war was a virtual stalemate; both sides, running low on funds and troops, unsuccessfully sought help from the German Protestants. Henry, Francis, and Charles attempted extensive diplomatic maneuvering to break the deadlock; but none of the three trusted the others, and this had little practical effect. In January 1546, Henry sent the Earl of Hertford to Calais, apparently preparing for an offensive; but one failed to materialize. Francis could not afford to resume a large-scale war, and Henry was concerned only for the disposition of Boulogne. Negotiations between the two resumed on 6 May. On 7 June 1546, the Treaty of Ardresalso known as the Treaty of Campwas signed by Claude d'Annebault, Pierre Ramon, and Guillaume Bochetel on behalf of Francis, and Viscount Lisle, Baron Paget and Nicholas Wotton on behalf of Henry. By its terms, Henry would retain Boulogne until 1554, then return it in exchange for two million ecus; in the meantime, neither side would construct fortifications in the region, and Francis would resume payment of Henry's pensions. Upon hearing the price demanded for Boulogne, the Imperial ambassador told Henry that the city would remain in English hands permanently. During the treaty negotiations, two Protestant mediatorsHan Bruno of Metz and Johannes Sturmwere concerned that Henry's war in Scotland was a stumbling block. The sixteenth article of the treaty made Scotland a party to the new peace, and Henry pledged not to attack the Scots again without cause. This gave Scotland a respite from the War of the Rough Wooing, but the fighting would recommence 18 months later.
Answer this question based on the article: How many days did the two sides negotiate before signing the Treaty of Ardres?
A:
31