Assertion: sea lamprey | /r/CapableOf | remain unchanged
Facets:
value: for more than 340 million years
type: TEMPORAL
value: largely
type: DEGREE
Source sentences:
text: Sea lampreys, which parasitize other fish by sucking their blood and other body fluids, have remained largely unchanged for more than 340 million years and have survived through at least four major extinction events.