Assertion: american chestnut tree | /r/HasProperty | modified gmorganisms
Facets:
value: genetically
type: MANNER
value: under such tight security
type: LOCATION
Source sentences:
text: These American chestnut trees (Castanea dentata) are under such tight security because they are genetically modified (GM) organisms, engineered to resist a deadly blight that has all but erased the once widespread species from North American forests.