The Historian is a drama film starring an American actor who earned his first Tonay nomination as lead actor in what 1966 musical?
John Cullum: John Cullum (born March 2, 1930) is an American actor and singer. John Cullum:  He earned his first Tony nomination as lead actor in a musical in 1966 for "On a Clear Day You Can See Forever" in which he introduced the title song, and more recently received Tony nominations for "Urinetown The Musical" (2002) (best actor in a musical) and as best featured actor in a musical the revival of "110 in the Shade" (2007).
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