Formerly the citadel of Belgrade , Kalemegdan was long the bull 's - eye that foreign invaders variously charged , captured , built up and eventually lost .
Belgrade /location/location/contains Kalemegdan
RB DT NN IN NNP , NNP VBD RB DT NN POS : NN IN JJ NNS RB VBN , VBN , VBN RB CC RB VBD .
Belgrade
LOCATION
Kalemegdan
PERSON
/location/location/contains