Problem: After a series of Mongol invasions of Korea between 1231 and 1281, Goryeo signed a treaty in favor of the Mongols and became a vassal state. Kublai was declared Khagan of the Mongol Empire in 1260 and established his capital at Khanbaliq in 1264. Japan at the time was ruled by the Shikken of the Hojo clan, who had intermarried with and wrested control from Minamoto no Yoriie, shogun of the Kamakura shogunate, after his death in 1203. The inner circle of the Hojo clan had become so preeminent that they no longer consulted the council of the shogunate ), the Imperial Court of Kyoto, or their gokenin vassals, and made their decisions at private meetings in their residences ). The Mongols also made attempts to subjugate the native peoples of Sakhalinthe Ainu, Orok, and Nivkh peoplesfrom 1260 to 1308.
Answer this question based on the article: How many native tribes of Sakhalin were there?
A: 3

Problem: The Raiders made it to their fourth Super Bowl in team history after posting a 12-4 regular season record. Raiders quarterback Jim Plunkett completed 230 out of 379 (60.7 percent) passes resulting in 2,935 yards and 20 touchdowns. His favorite target was tight end Todd Christensen, who led the NFL with 92 receptions for 1,247 yards and 12 touchdowns. Wide receivers Cliff Branch and Malcolm Barnwell combined for 74 receptions, 1,209 yards, and 6 touchdowns. But the largest impact on offense was running back Marcus Allen. In just his second NFL season, Allen led the team in rushing yards (1,014) and total yards from scrimmage (1,604), while ranking second on the team in receptions (68) and touchdowns (11). But Allen was not the only key running back on the team. Kenny King (running back) and Frank Hawkins combined for 1,119 total rushing and receiving yards, and 10 touchdowns. Los Angeles also had a powerful special teams attack led by Greg Pruitt, who led the NFL in punt returns (58), and punt return yards (666), while adding another 604 yards returning kickoffs and rushing for 154 yards and two scores.
Answer this question based on the article: How many yards were Greg Pruitt's punt returns on average, to two decimal places?
A: 11.48

Problem: The Vikings opened their season on the road against the St. Louis Rams and took the lead in the first half with a field goal in each quarter from 52 yards and 46 yards, respectively, from third-year kicker Blair Walsh and an eight-yard touchdown pass from Matt Cassel to Greg Jennings with 21 seconds left in the half, set up by an interception from Josh Robinson at the Rams' 35-yard line. The Rams struck back early in the third quarter with a field goal from Greg Zuerlein before Vikings wide receiver Cordarrelle Patterson made the play of the game with a 67-yard touchdown run. The Vikings secured the game late in the fourth quarter as TE Kyle Rudolph connected with Cassel on a seven-yard touchdown pass, while Rudolph's former Notre Dame teammate Harrison Smith took an interception 81 yards for the Vikings' fourth touchdown of the game. Zuerlein added another field goal late in the game to make the final score 34-6 to the Vikings, their first road victory since week 16 of the 2012 season against the Houston Texans.
Answer this question based on the article: How many field goals were kicked during the game?
A:
4