20489
It has sent mixed signals about its willingness to take part in the exchange - rate mechanism of the European Monetary System , which links the major EC currencies .
 the European Monetary System, EC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 the European Monetary System, EC