question: The Crimean campaigns of 1687 and 1689 were two military campaigns of the Tsardom of Russia against the Crimean Khanate. They were a part of the Russo-Turkish War and Russo-Crimean Wars. These were the first Russian forces to come close to Crimea since 1569. They failed due to poor planning and the practical problem of moving such a large force across the steppe but nonetheless played a key role in halting the Ottoman expansion in Europe. The campaigns came as a surprise for the Ottoman leadership, spoiled its plans to invade Poland and Hungary and forced it to move significant forces from Europe to the east, which greatly helped the League in its struggle against the Ottomans. Having signed the Eternal Peace Treaty with Poland in 1686, Russia became a member of the anti-Turkish coalition , which was pushing the Turks south after their failure at Vienna in 1683 . Russia's role in 1687 was to send a force south to Perekop to bottle up the Crimeans inside their peninsula.
Answer this question: How many years passed between the two Crimean campaigns?
answer: 2

question: The 49ers would score touchdowns on each of three Cowboys turnovers, all before halftime. Even though the Cowboys held a significant edge in 1st quarter time of possession (13:26 to 1:34), the 49ers had a 21-3 lead due to the turnovers. With the 49ers up 28-3, the Cowboys would find themselves with their largest halftime deficit in a home opener ever. Although the 49ers would not score again in the second half, they would only hold the Cowboys to 14 more points, and win the game.
Answer this question: How many points did the Cowboys have at the end of the game?
answer: 17

question: The county's western and southern boundaries lie deep within gorges carved by the Colorado and San Juan Rivers. Tributary canyons, cutting through rock layers of the surrounding deserts, have carved the land up with chasms, cliffs and plateaus. In the center of the county are Cedar Mesa, Comb Wash, Natural Bridges and Hovenweep National Monuments. Canyonlands National Park is primarily within the county borders. The Eastern side of Glen Canyon National Recreation Area / Lake Powell in also in San Juan County. Rising above all, the Blue Mountains reach to nearly 12,000 feet and the La Sal Mountains rise to 13,000 feet . Both ranges are covered with lush forests vividly contrasting with the scenery below. The elevation change within the county is from near 13,000 feet in the La Sal Mountains to 3,000 feet at Lake Powell, an elevation change of 10,000 feet . The county is cut by deep and spectacular canyons, red rock and mountain meadows, desert, and evergreen forest. The towns run primarily on a north/south axis along U.S. Route 191 and U.S. Route 163 from La Sal in the north to Monument Valley in the south.
Answer this question: How many feet is the difference between the height of the La Sal Mountains and the Blue Mountains?
answer:
1000