Assertion: formaldehyde | /r/HasProperty | a product of combustion
Facets:
Source sentences:
text: It is also a product of combustion found in tobacco smoke and the fumes from gas stoves and other unvented combustion.
text: It is also a combustion product found in tobacco smoke.
text: It is also a product of combustion found in tobacco smoke and the fumes from gas stoves and other unvented combustion.