Assertion: rubber | /r/HasProperty | mixed with sulfur
Facets:
value: on a hot stove
type: LOCATION
Source sentences:
text: These undesirable properties of natural rubber were not overcome until 1839, when American inventor Charles Goodyear (1800–1860), at the end of five years of constant experimentation, accidentally placed a sample of rubber mixed with sulfur and litharge (lead oxide, PbO) on a hot stove in Woburn, Massachusetts.
text: In 1839 he accidentally dropped some India rubber mixed with sulfur on a hot stove and so discovered vulcanization.