Assertion: sodium carbonate | /r/HasProperty | based on principal historical method
Facets:
Source sentences:
text: The name "soda ash" is based on the principal historical method of obtaining alkali, which was by using water to extract it from ashes.
text: The name "soda ash" is based on the principal historical method of obtaining alkali, which was by using water to extract it from the ashes of certain plants.