Complex sentence: Gerry Carroll is a politician from Belfast, Northern Ireland, who, since May 2016 has represented Belfast West in the Northern Ireland Assembly since 2016 and since 2014 has represented the Black Mountain district electoral area on Belfast City Council.
Split into simpler sentences: Gerry Carroll is a politician from Belfast, Northern Ireland, who, since May 2016 has represented Belfast West in the Northern Ireland Assembly. Since 2014 he has represented the Black Mountain district electoral area on Belfast City Council.