question: From 1876 to 1973 , how much did the glaciers that covered the Alps shrink ?
answer: to 1,342 km2 ( 518 sq mi )
turker_answer: From 1876 to 1973 the glaciers that covered the Alps shrank 1,342 km2 ( 518 sq mi ) .
rule-based: From 1876 to 1973 , to 1,342 km2 ( 518 sq mi did the glaciers that covered the Alps shrink .