55022
The country has been a member of the Schengen Area since 1 May 2004 , having abolished border controls , completely opening its borders with all of its neighbors on 21 December 2007 .
 Schengen Area
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Schengen Area