68503
It serves main lines to Cologne , Mönchengladbach and Liège as well as branch lines to Heerlen , Alsdorf , Stolberg and Eschweiler .
 Cologne, Mönchengladbach, Liège, Heerlen, Alsdorf, Stolberg, Eschweiler
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cologne, Mönchengladbach, Liège, Heerlen, Alsdorf, Stolberg, Eschweiler