Assertion: fennel's ingredient | /r/HasProperty | anethole
Facets:
Source sentences:
text: Fennel, particularly its ingredient anethole, decreased pain in animals without causing sedation.
text: Anise seed is the best option for duplicating the flavor of fennel, as it has an active ingredient called anethole, as well as small amounts of estragole, the ingredient that gives fennel its unique taste.