Complex sentence: In 2011 the clubs Sunday team won their third consecutive championship, when the team was promoted for three consecutive seasons from the Vierde Klasse to the Eerste Klasse, followed by promotion to the Hoofdklasse.
Split into simpler sentences: In 2011 the clubs Sunday team won their third consecutive championship, when the team was promoted for three consecutive seasons. From the Vierde Klasse to the Eerste Klasse, followed by promotion to the Hoofdklasse.