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.

Example Input: Given Relationship: 'fly from', Sentence: 'Aer Arann are to fly from Blackpool to Dublin following Ryanair 's decision to quit Blackpool Airport .'
Example Output: from

Example Input: 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 . "'
Example Output: key

Example Input: Given Relationship: 'present to', Sentence: 'Paper presented at the American Anthropological Association Annual Meeting , Atlanta , Georgia .'
Example Output:
presented