Ezra Parmenter (March 20 1823 January 31 1873) was a Massachusetts politician who served in both branches of the Massachusetts legislature as an overseer of the poor bridge commissioner a city councilor and as the thirteenth Mayor of Cambridge Massachusetts.Parmenter was born to William Parmenter and Mary (Parker) Parmenter on March 20 1823. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Office Holder