51013
In the Czech Republic , white dill sauce made of cream ( or milk ) , butter , flour , vinegar , and dill is called " koprová omáčka " ( also " koprovka " or " kopračka " ) and is served either with boiled eggs and potatoes , or with dumplings and boiled beef .
 Czech Republic
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:
 Czech Republic