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: 'be president of', Sentence: 'Join us in supporting Hillary Clinton for President of the United States to bring back our democracy !'

SOLUTION: President

PROBLEM: Given Relationship: 'be call', Sentence: 'Seattle might be called The Emerald City , but you 'll be the gem that everyone talks about if you 're wearing Armani Exchange .'

SOLUTION: called

PROBLEM: Given Relationship: 'be son of', Sentence: '8 And he called James and John , who were sons of Zebedee , and partners with Simon .'

SOLUTION:
sons