| http://www.w3.org/ns/prov#value | - A method according to claim 6 wherein R1 is selected from the group consisting of --(A)--Z wherein A is selected from the group consisting of an alkylene group of from 2 to 10 carbon atoms and a moiety of the form --(CH2 --CR.sub. 5 G)n -- wherein n is an integer equal to 1 to 5; R5 is selected from the group consisting of hydrogen, methyl, and ethyl; and G is selected from the group consisting o
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