Assertion: rubber | /r/HasProperty | obtained
Facets:
value: from latex
type: OTHER
value: from the exudation of plants
type: OTHER
value: easily
type: MANNER
value: principally
type: OTHER
value: from landolphia vines
type: LOCATION
Source sentences:
text: By 1900 more than 40,000 tons were used each year, about one-half from Brazil and one-half from Central Africa, where rubber was obtained principally from Landolphia vines.
text: Natural rubber is obtained from the exudation of plants, while the man-made variant, known as synthetic rubber, is synthesized from petroleum byproducts.
text: However, as an important industrial material, rubber was required in larger amounts than could easily be obtained from wild and widely dispersed trees in the Brazilian jungle or from African vines that produced only about one kilogram per hectare and were destroyed to obtain the rubber.
text: Natural rubber is obtained from latex produced by the rubber tree (Hevea brasilienesis).