Assertion: acetylene | /r/HasProperty | manufactured by partial combustion of methane
Facets:
value: mainly
type: OTHER
value: since the 1950s
type: TEMPORAL
Source sentences:
text: Since the 1950s, acetylene has mainly been manufactured by the partial combustion of methane.
text: Acetylene (acetyline [sic]) is manufactured by the partial combustion of methane (natural gas) or as a by-product in the ethylene stream from hydrocarbon cracking.
text: Today acetylene is mainly manufactured by the partial combustion of methane or appears as a side product in the ethylene stream from cracking of hydrocarbons.