| http://www.w3.org/ns/prov#value | - wherein R1 represents a hydrogen or a methyl group; R2 represents a divalent organic group containing at least one oxyalkylene group and the organic group may be linear, branched or cyclic and may contain one or more atoms other than carbon, hydrogen or oxygen, x and y each represents zero or a number of between 1 and 5; z represents zero or a numerical value of between 1 and 10, provided that z i
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