Complex sentence: He is visiting professor in the anthropology department at the London School of Economics and was previously Canon Chancellor of St Paul's Cathedral and director of the St Paul's Institute from 2009 until his resignation in October 2011.
Split into simpler sentences: He is visiting professor in the anthropology department at the London School of Economics. He was previously Canon Chancellor of St Paul's Cathedral and director of the St Paul's Institute from 2009 until his resignation in October 2011.