Complex sentence: David Jeffrey (born 28 October 1962) is a Northern Irish football manager of Ballymena United and former player best known for managing Linfield between 1997 and 2014.
Split into simpler sentences: David Jeffrey (born 28 October 1962) is a Northern Irish football manager and former player, currently managing Ballymena United. He is best known for managing Linfield between 1997 and 2014.