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: 'invade', Sentence: 'It is increasingly clear that the Bush Administration is dead set on invading Iraq and overthrowing Saddam Hussein despite U.S. and international law , domestic or foreign opposition .'

A: invading
****
Q: Given Relationship: 'discover', Sentence: 'School children throughout the United States and Canada will tell you that Christopher Columbus discovered America when he was searching for a faster , more efficient route to the riches of India .'

A: discovered
****
Q: Given Relationship: 'be city in', Sentence: 'Berlin is one of the most historic cities in Germany , its lively and cosmopolitan metropolis define the city as any cities in oneBerlin past is really dark since Adolf Hittler assumed power .'

A:
city
****