Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Given Relationship: 'be mayor of', Sentence: 'London mayor Ken Livingstone has said : " This will build on what has already been achieved in terms of extended bus provision , and in due course providing additional underground capacity .'
Student:
mayor