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.

Given Relationship: 'be city in', Sentence: 'Milan hotels -Milan is either Italy 's second or first city , depending on who you ask .'
city

Given Relationship: 'be friend of', Sentence: 'I have always taken the position that Israel is a friend of the United States , and that friends should always stand up for one another , even in difficult times .'
friend

Given Relationship: 'marry', Sentence: 'Mexican painter Frida Kahlo marries fellow artist Diego Rivera who shares her radical political views .'
marries