| http://www.w3.org/ns/prov#value | - (b) No person may be excused from attending and testifying or from producing records, correspondence, documents or other evidence in obedience to subpoena, on the ground that the testimony or evidence required of him may tend to incriminate him or subject him to a penalty or forfeiture, but no person may be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction,
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