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.

[EX Q]: Given Relationship: 'be key to', Sentence: 'As present processes are thought to explain all past events , the Uniformitarianism slogan is " the present is the key to the past . "'
[EX A]: key

[EX Q]: Given Relationship: 'be island in', Sentence: 'Travellers are advised to avoid travelling to most of Mindanao , an island in the southern Philippines , especially the Zamboanga peninsula and the Sulu archipelago , where ethnic and religious animosities fuel ongoing violence .'
[EX A]: island

[EX Q]: Given Relationship: 'be home of', Sentence: 'George Washington 's home at Mount Vernon is also well worth the wait in line .'
[EX A]:
home