Complex sentence: Antti Mikko Niemi (born 31 May 1972) is a retired Finnish football goalkeeper, who worked as a goalkeeping coach for Brighton and Hove Albion during the 2014-15 season.
Split into simpler sentences: Antti Mikko Niemi (born 31 May 1972) is a retired Finnish ￼ ￼ footballer ￼ ￼ who played as a goalkeeper. He has also worked as a goalkeeping coach at Brighton & Hove Albion during the 2014--15 season.