Assertion: gas's quantity | /r/HasProperty | added
Facets:
Source sentences:
text: Beginning in 1916, Charles F. Kettering began investigating additives based on two paths, the "high percentage" solution (where large quantities of ethanol were added) and the "low percentage" solution (where only 2–4 grams per gallon were needed).
text: The quantity to be added and approval for its use in various grades of fuel is strictly controlled by the appropriate specifications.