Assertion: crude oil | /r/HasProperty | clean
Facets:
value: in a circulatory system
type: OTHER
Source sentences:
text: It is apparent that in a circulatory system the oil will only be as clean as the filter can make it, thus it is unfortunate that there are no industry standards by which consumers can readily assess the filtering ability of various automotive filters.
text: Oil is a cleaner fuel than coal, but it still has many disadvantages, such as the following:
text: Oil and natural gas are cleaner fuels than coal, but they still have many environmental disadvantages.