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 Input:
Given Relationship: 'be son of', Sentence: 'And Gideon the son of Joash died4 in a good old age , and was buried11 in the sepulchre of Joash his father , in Ophrah of the Abiezrites .'

Ex Output:
son


Ex Input:
Given Relationship: 'file to', Sentence: 'July 9th , 2002 - Coming this fall , Nintendo 's Game Boy To Play MP3 and WMA files using a $ 99 add-on component .'

Ex Output:
files


Ex Input:
Given Relationship: 'be city of', Sentence: 'Located in the demographic heart of Auckland , New Zealand 's largest city , over 50 % of Auckland 's population can access Sylvia Park within a 20 minute drive time .'

Ex Output:

city