Original sentence: Colin Calderwood (born 20 January, 1965 in Stranraer, Scotland) is a former football player and current manager of Nottingham Forest, having been appointed in May 2006
Edited sentence: Colin Calderwood (born 20 January, 1965 in Stranraer, Scotland) is a former football player and  the best manager in the world.He is currently manager of Nottingham Forest, having been appointed in May 2006