55957
The common chiffchaff has three still commonly accepted subspecies , together with some from the Iberian Peninsula , the Canary Islands , and the Caucasus which are now more often treated as full species .
 Iberian Peninsula, Canary Islands, Caucasus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Iberian Peninsula, Canary Islands, Caucasus