Complex sentence: Prior to the 2010 contest Sweden was among the few countries not to have missed a Eurovision final since 1976, but this record was broken in 2010 when Anna Bergendahl failed to make it to the final in Oslo.
Split into simpler sentences: Prior to the 2010 contest Sweden was among the few countries not to have missed a Eurovision final since 1976. However, this record was broken in 2010 when Anna Bergendahl failed to make it to the final in Oslo.