Complex sentence: Erdal Keser (born 20 June 1961) is a former player of Borussia Dortmund, PEC Zwolle, Sarıyer and Galatasaray SK.
Split into simpler sentences: Erdal Keser (born June 20,1961) is a retired Turkish footballer. He former played for Borussia Dortmund, PEC Zwolle, Sarıyer and Galatasaray SK.