| http://www.w3.org/ns/prov#value | - Z is selected from the group consisting of a covalent bond, oxygen, sulfur, ???S(???O)???, ???C(???O)???, ???(O???)S(???O)???, and ???N(R)???, where R is aryl (of about 6 to about 20 carbons, such as phenyl), acyl (of about 2 to about 20 carbons, such as acetyl, benzoyl, and so forth), a carbon-to-carbon bond, or ???(R4???)C(???R5)???, where R4 and R5 are independently selected from the group cons
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