Complex sentence: He started his career in his local team Asker, before moving to Stabæk in the Norwegian Premier League for some years, but when Stabæk lost the final match in 2004 against Vålerenga, they were relegated for the 2005 season.
Split into simpler sentences: He started his career in his local team Asker, before moving to Stabæk in the Norwegian Premier League for some year. But when Stabæk lost the final match in 2004 against Vålerenga, they were relegated for the 2005 season.