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: 'invade', Sentence: 'He referred to the USA invading Iraq without cause and nothing being done about it .'

SOLUTION: invading

PROBLEM: Given Relationship: 'be capital of', Sentence: 'Cusco is the ancient capital of Inca empire and is a beautiful , beautiful town .'

SOLUTION: capital

PROBLEM: Given Relationship: 'be river in', Sentence: 'The great Zambezi river runs through southern Africa .'

SOLUTION:
river