Assertion: carbon tetrachloride | /r/HasProperty | important products
Facets:
value: since
type: TEMPORAL
value: commercially
type: MANNER
Source sentences:
text: Carbon tetrachloride and perchlorethylene are commercially important products, while hexachlorbenzene at present has little value.
text: Carbon tetrachloride is a vital chemical which was introduced by a French chemist in 1839 and has been an important inorganic chemical since.