Assertion: eurasian water chestnut | /r/AtLocation | the united states
Facets:
value: since the 1880s
type: TEMPORAL
Source sentences:
text: Eurasian water chestnut (Trapa natans) has been present in the United States since the latter half of the 19th century and is a well-known invasive species.
text: Eurasian water chestnut (Trapa natans) has been present in the United States since the 1880s and is a well-known invasive species.