Mayoralty of Gavin Newsom
The Mayoralty of Gavin Newsom began when Democrat Gavin Newsom was elected Mayor of San Francisco in 2003 , succeeding Willie Brown and becoming San Francisco's youngest mayor in a century . 
<triplet> Gavin Newsom <subj> Democrat <obj> member of political party <subj> Mayor of San Francisco <obj> position held <triplet> Willie Brown <subj> Democrat <obj> member of political party <subj> Mayor of San Francisco <obj> position held