Assertion: glacier's retreat | /r/CapableOf | start around the middle of the 19th century
Facets:
Source sentences:
text: The global retreat of glaciers observed today started around the middle of the 19th century at the end of the Little Ice Age.
text: The global retreat of glaciers observed today started around the middle of the 19th century, coinciding with the end of the Little Ice Age (10), when the anthropogenic forcing of the climate system was very weak as compared to today (15).