Assertion: glacier's ice | /r/HasProperty | accumulated at the top of the ice sheet
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Source sentences:
text: Although there have been some gains at high altitudes, significant ice losses are occurring at low altitudes (Wouters 2008) along the coastline where glaciers are calving ice into the oceans far quicker than ice is being accumulated at the top of the ice sheet (Rignot and Kanagaratnam 2006).