| http://www.w3.org/ns/prov#value | - organic group represented by the following general formula (1): ##STR4## where n' is an integer of 0 or 1; p is 0 or more; R1 -R5, which may be the same or different, each is a group selected from the group consisting of an alkyl group, an alkoxyl group, a phenyl group, a substituted phenyl group, a phenoxyl group, a substituted phenoxyl group and an organosiloxane group, with the other being a
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