Assertion: sourdough | /r/HasProperty | the oldest leavened bread
Facets:
Source sentences:
text: Sourdough is the oldest leavened bread; the bubbles that make it rise are created not by the commercial yeast used in the vast majority of bread baking, Saccharomyces cerevisiae, but by naturally occurring yeasts found on flour and in the air.
text: Sourdough is an old form of bread leavening.
text: Sourdough is the oldest form of leavened (or ‘risen’) bread.