| http://www.w3.org/ns/prov#value | - o X, a monovalent hydrocarbon group of the type represented by Rf, d represents a whole number of at least 1, c represents a whole number equal to at least 0 or more, a, b and c represent whole numbers including 0, a or c but not both may be 0, and wherein n is an integer of at least 2.
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