Assertion: sourdough | /r/HasProperty | a method of leavening bread
Facets:
value: based on uncooked bread dough
type: OTHER
Source sentences:
text: Sourdough is a method of leavening bread, based on uncooked bread dough (known as 'mother dough' or 'sourdough starter') that has soured and been populated by natural air-borne yeasts.