Complex sentence: In 2007, the championships took place in Oberstdorf, Germany from February 26 to March 4 and in Sofia, Bulgaria in 2008 from February 25 to March 2.
Split into simpler sentences: In 2007, the championships took place in Oberstdorf, Germany from February 26 to March 4. The event will take place in Sofia, Bulgaria in 2008 from February 25 to March 2.