| http://www.w3.org/ns/prov#value | - 3; and l is an integer of 0 or 1, and when l=1, Y is a straight-chain alkylene group having 2 to 12 carbon atoms, a substituted or unsubstituted branched alkylene group having 3 to 12 carbon atoms, a bivalent group comprising at least one alkylene group having 1 to 10 carbon atoms, and at least one oxygen atom and/or one sulfur atom, ???O???, ???S???, ???SO???, ???SO2???, ???CO???, ???COO???, in
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