The Second Goryeo-Khitan War was an 11th-century conflict between the kingdom of Goryeo and the Liao dynasty near what is now the border between China and North Korea. It was the second of the Goryeo-Khitan Wars, with the First Goryeo-Khitan War occurring in 993, the second in 1010, and the third in 1018. When King Seongjong died in 997, Liao invested his successor Wang Song as king of Goryeo . In 1009, he was assassinated by the forces of the general Gang Jo. Using it as a pretext, the Liao attacked Goryeo in the next year. They lost the first battle but won the second one, and Gang Jo was captured and killed. The Liao occupied and burnt the Goryeo capital Kaesong. The Khitan withdrew after Goryeo reaffirmed its tributary relationship with the Khitan.

How many years after King Seongjong died did the Third Goryeo-Khitan War begin?
A: 21

Captain John Lovewell made three expeditions against the Indians. On the first expedition in December 1724, he and his militia company of 30 men left Dunstable, New Hampshire, trekking to the north of Lake Winnipesaukee into the White Mountains of New Hampshire. On December 10, 1724, they and a company of rangers killed two Abenakis.:65 In February 1725, Lovewell made a second expedition to the Lake Winnipesaukee area.:65 On February 20, his force came across wigwams at the head of the Salmon Falls River in Wakefield, New Hampshire, where ten Indians were killed.

How many more natives were killed in the second expedition than the first?
A: 8

Timur, a Turco-Mongol from Transoxiana , had built an empire in Central Asia over the years, and became the most powerful ruler in Central Asia since Genghis Khan . He sought to rebuild the once great Mongol Empire. In the 1380s and 1390s, he invaded and conquered parts of Persia , ravaged southern Russia and Ukraine , and invaded India . Although there had been tensions between the Ottomans and Mongols, nothing would warrant a war, until Bayezid demanded tribute from an emir loyal to Timur, which he understood to be personal and a reason for war. In 1400-01 Timur took Sivas from the Ottomans, parts of Syria from the Mamluks, and next directed towards Anatolia. Meanwhile, in 1402, the Ottomans had been campaigning in Europe. Bayezid broke off the blockade of Constantinople and marched to Ankara after Timur again moved his army to the southeast in the summer of 1402.

How many regions did Timur invade during the 1380s and 1390s?
A:
4