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.

[Q]: Given Relationship: 'be city of', Sentence: 'It is the only freighter service operating from Coimbatore Airport , which is located in a highly industrialised area and is the second largest city in the state of Tamil Nadu .'
[A]: city


[Q]: Given Relationship: 'begin at', Sentence: 'Early 1861 : Some speculate that the Civil War could have begun in Florida instead of Fort Sumter , South Carolina .'
[A]: begun


[Q]: Given Relationship: 'be son of', Sentence: 'In closing my remarks on this subject , I feel that it is worth repeating a very amusing story related to me by the son of Charles Henry St . John Cooper some time ago .'
[A]:
son