| http://www.w3.org/ns/prov#value | - It includes, for example, the following polymers. ##STR4## (R1 and R2 are an alkyl group and may be the same or different.) ##STR5## (R1 and R2 are an alkyl group and may be the same or different.) ##STR6## (R1 and R2 are an alkyl group and may be the same or different.) ##STR7## (R1 and R2 are an alkyl group and may be the same or different.)
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