Assertion: bog | /r/HasProperty | useful
Facets:
value: for thousands of years
type: TEMPORAL
value: for humans
type: TRANSITIVE-OBJECT
Source sentences:
text: In addition to being unique ecosystems, bogs have also been useful for humans for thousands of years, providing a source of fuel in the form of peat and food in the form of berries which grow on bog shrubs such as cranberries.