From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.

[EX Q]: Given Relationship: 'be city in', Sentence: 'Cost : customised by the event agencies that supervise City Tracks : EventMosaic in Ghent , Bruges and Ostend and Kelly Events in Antwerp and other Belgium cities .'
[EX A]: cities

[EX Q]: Given Relationship: 'open on', Sentence: 'Registration for Cybernet Expo will open in February .'
[EX A]: open

[EX Q]: Given Relationship: 'be city of', Sentence: 'Lahore is Pakistan 's second largest city and the capital of the northeastern province of Punjab .'
[EX A]:
city