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It's quite easy to figure out, just use the elimination method. Imagine if were to call a single country on the peninsula "Europe" and see if it fits.
Example
Only Turkey is Europe and none else
Only Georgia is Europe and none else
Only Serbia is Europe and none else
Only Macedonia is Europe and none else
Only Croatia is Europe and none else
Only Albania is Europe and none else
Only Romania is Europe and none else
See how easy it is?