Complex sentence: He moved to Scotland's Partick Thistle in August 2007,he joined Dumbarton in the Scottish Football League Third Division helping the Sons to win the league championship in May 2009.
Split into simpler sentences: He moved to Scotland's Partick Thistle in August 2007, he joined Dumbarton in the Scottish Football League Third Division. Keegan helped the Sons to win the Third Division championship in May 2009.