Assertion: toxin | /r/CreatedBy | living things
Facets:
value: naturally
type: MANNER
Source sentences:
text: Toxin is a harmful substance that is produced by living things.
text: A toxin, on the other hand, is a poison that is produced naturally or biologically by living things.
text: A toxin, on the other hand, is a poison that is produced naturally or biologically by living things.