Richard Nixon Library & Birthplace
...that the Richard Nixon Library & Birthplace is the only U.S. presidential library that is not a part of the official National Archives and Records Administration system?
...that the <b id="mwAf4"><a class="mw-redirect" href="./Richard_Nixon_Library_&amp;_Birthplace" id="mwAf8" rel="mw:WikiLink" title="Richard Nixon Library &amp; Birthplace">Richard Nixon Library &amp; Birthplace</a></b> is the only <a href="./United_States" id="mwAgA" rel="mw:WikiLink" title="United States">U.S.</a> <a href="./Presidential_library" id="mwAgE" rel="mw:WikiLink" title="Presidential library">presidential library</a> that is not a part of the official <a href="./National_Archives_and_Records_Administration" id="mwAgI" rel="mw:WikiLink" title="National Archives and Records Administration">National Archives and Records Administration</a> system?