Assertion: caraway's seed | /r/MadeOf | essential oil
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Harvesting is best done on sunny days when the seeds contain more essential oil.
text: The seeds have an oily endosperm and often contain essential oils, containing aromatic compounds that are responsible for the flavour of commercially important umbelliferous seed such as anise, cumin and coriander.