Assertion: silk | /r/CreatedBy | silk worms
Facets:
value: to form the cocoon
type: PURPOSE
Source sentences:
text: Made entirely of natural fibres, silk originated in ancient China over 5,000 years ago and is produced by several insects (such as silk worms) but in general, only the silk of moth caterpillars is used for textile manufacturing.
text: Silk is produced by silk worms (Bombyx mori) to form the cocoon within which the larvae develop.