How many league titles has the Norwegian professional football club for which Jan Christiansen played in Trondheim won?
Rosenborg BK Rosenborg Ballklub, commonly referred to simply as Rosenborg (] ) or (especially locally) RBK, is a Norwegian professional football club from Trondheim that plays in the Eliteserien.The club have won a record 24 league titles, eleven Norwegian Football Cup titles and have played more UEFA matches than any other Norwegian team. RBK play their home games at the all-seater Lerkendal Stadion which has a capacity of 21,400. Kåre Ingebrigtsen was appointed head coach in July 2014.
Storms BK Storms Ballklubb is a Norwegian association football club from Skien. Storm BK is the football-department of "IF Storm" and was founded on 12 July 1902. Storm was one of the best football-clubs in Grenland in the first years after the Second World War, and were playing in Hovedserien, the top league of Norwegian football, in 1948–49 and 1949–50. Today the club is playing in the Fourth Division, the fifth tier of the Norwegian league system. Anker Kihle and Johan Lauritzen have both been capped for Norway while playing for Storm.