| http://www.w3.org/ns/prov#value | - independently of the others, is an integer which is 0, 1, 2, or 3 c, is an integer which is 0, 1, 2, 3, or 4, each R5, R6, and R7, independently of the others, is (i) an alkyl group, (ii) an aryl group, (iii) an arylalkyl group, (iv) an alkylaryl group, (v) a halogen atom, (vi) an ester group, (vii) an amide group, (viii) a sulfone group, (ix) an amine group or ammonium group, (x) a nitrile group
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