Instructions: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Input: How many square kilometers of the Alps were covered by glaciers in the year that comes two years after 1874?, Context: High levels of precipitation cause the glaciers to descend to permafrost levels in some areas whereas in other, more arid regions, glaciers remain above about the 3,500 m (11,483 ft) level. The 1,817 square kilometres (702 sq mi) of the Alps covered by glaciers in 1876 had shrunk to 1,342 km2 (518 sq mi) by 1973, resulting in decreased river run-off levels. Forty percent of the glaciation in Austria has disappeared since 1850, and 30% of that in Switzerland.
Output:
1,817