| http://www.w3.org/ns/prov#value | - wherein in that depicted structure, X represents H, Li, Na, K or NR1 R2 R3 R4, and R1 R2 R3 and R4 are H, CH3 or C2H5, and m is an integer same or greater than 1, and n is 2, and x is real number of 5 to 13.5, and y is integer above 1000.
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