Complex sentence: Ukraine has participated in the Eurovision Song Contest twelve times, debuting in 2003 with a 14th place finish for Oleksandr Ponomaryov, before winning at their second attempt when Ruslana won the 2004 contest with "Wild Dances".
Split into simpler sentences: Ukraine has participated in the Eurovision Song Contest 12 times, debuting in 2003 with a 14th place finish for Oleksandr Ponomaryov. Ukraine won the contest at the second attempt when Ruslana won the 2004 contest with "Wild Dances".