Assertion: alkaloid | /r/CapableOf | play key role
Facets:
value: in plant ecology
type: LOCATION
value: in medicine
type: LOCATION
value: since ancient times
type: TEMPORAL
Source sentences:
text: While they certainly can be dangerous and risks of dependability are high, alkaloids have played a key role in medicine since ancient times.
text: Alkaloids play key roles in plant ecology by targeting the central and peripheral nervous systems of invertebrate and vertebrate animals, affecting their behavior, eliciting toxicoses, and reducing herbivory  .