| http://www.w3.org/ns/prov#value | - Some of the special features are the inclusion of the Standard International Unit Symbols, Periodic Table of the Elements, multiplication table, Roman numerals, a section covering the history of the American flag, Declaration of Independence, the Constitution, including the Bill of Rights, a biography of all U.S. presidents, maps of the world and many more features,??? Seibert said.
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