Table:
text: Eurovision Song Contest 2009
Semi-final 2
Semi-final 2
Draw Language_ Artist Song English_translation Place Points
01 Croatian Igor Cukrov feat. Andrea  Lijepa Tena  Beautiful Tena 13 33
02 English Sinéad Mulvey and Black Daisy  Et Cetera  — 11 52
03 Russian Intars Busulis  Probka  (Пробка) Traffic jam 19 7
04 Serbian Marko Kon and Milaan  Cipela  (Ципела) Shoe 10 60
05 English Lidia Kopania  I Don`t Wanna Leave  — 12 43
06 English Alexander Rybak  Fairytale  — 1 201
07 English Christina Metaxa  Firefly  — 14 32
08 Slovak Kamil Mikulčík and Nela  Leť tmou  Fly through the darkness 18 8
09 English Niels Brinck  Believe Again  — 8 69

Question: What is the average score if the artist is kamil mikulčík and nela and the place is greater than 18 for Eurovision Song Contest 2009 semi-final 2?