Complex sentence: IF Vallentuna BK is a sports club based in Vallentuna, Stockholm County, Sweden, perhaps best known for their ice hockey department, Vallentuna Hockey, which played two seasons in HockeyAllsvenskan 2002--2004.
Split into simpler sentences: IF Vallentuna BK is a sports club based in Vallentuna, Stockholm County, Sweden. Their ice hockey department, Vallentuna Hockey, played two seasons in HockeyAllsvenskan 2002--2004.