Assertion: trichloroethylene | /r/HasProperty | produced since the 1920s
Facets:
value: commercially
type: MANNER
Source sentences:
text: Produced commercially since the 1920s, trichloroethylene has been used as a solvent and degreaser.
text: Produced commercially since the 1920s, trichloroethylene has been used as a solvent and degreaser.