Assertion: potato | /r/HasProperty | grown throughout northern europe
Facets:
value: extensively
type: DEGREE
value: by the early 19th century
type: TEMPORAL
Source sentences:
text: By the early 19th century, potatoes were being grown extensively throughout Northern Europe, and potatoes were almost solely relied upon as a foodstuff in Ireland owing to this vegetable's inexpensive production and the poor economy of this country.