Assertion: sea lamprey | /r/CapableOf | inflict significant economic damage
Facets:
value: beginning in 1921
type: TEMPORAL
value: since entering lake ontario
type: TEMPORAL
Source sentences:
text: Since entering Lake Ontario in the mid-1800s, and the upper Great Lakes beginning in 1921, sea lampreys have inflicted significant economic damage, harmed the fishery and ecosystem, and changed the way of life in the region.