328683
There were four pairs of services ( EC 40 – 47 ) linking Berlin Zoo and Warsaw Wschodnia , plus a fifth ( 48/49 ) , which only ran from Berlin to Poznan , and as such did n't take the BWE name .
 Berlin, Warsaw, Berlin, Poznan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Berlin, Warsaw, Berlin, Poznan