Complex sentence: From 1994 to 2000 she was a senator (member of the governing board) of the national academic honor society Phi Beta Kappa, and from 2006 to 2012 she served as a chancellor of the Academy of American Poets.
Split into simpler sentences: From 1994 to 2000 she was a senator (member of the governing board) of the national academic honor society Phi Beta Kappa. From 2006 to 2012 she served as a chancellor of the Academy of American Poets.