| http://www.w3.org/ns/prov#value | - where R1 is a hydrogen atom or an OH group or a group OR2, where R2 is an alkyl group of about 1 to about 18 carbon atoms, or an alkenyl group of about 2 to about 18 carbon atoms or a group of the formula: where R3 is a hydrogen atom, or an alkyl group of about 1 to about 21 carbon atoms or an alkylene group of about 2 to about 21 carbon atoms; and combinations thereof; and wherein said drilling
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