TASK DEFINITION: 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.
PROBLEM: Given Relationship: 'join', Sentence: 'Turkey 's effort to join the European Union has already been an up and down affair .'

SOLUTION: join

PROBLEM: Given Relationship: 'be part of', Sentence: 'In Britain they are most numerous in the rocky western parts such as Cornwall , Wales , Scotland and Ireland , though they are also found further to the east in Wiltshire and Oxfordshire for example .'

SOLUTION: parts

PROBLEM: Given Relationship: 'become', Sentence: 'Chu became Chuck , Bu became Buck .'

SOLUTION:
became