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: 'sit to', Sentence: 'Xena sat in silent awe as Gabrielle hopped up happily , planted a kiss on the warrior 's cheek with a resounding smack and clambered into her saddle , humming under her breath .'
into

Given Relationship: 'be succeed by', Sentence: 'Julius II . was busied with his Council of the Lateran when he died , and was succeeded in the Papal chair by Cardinal John de Medici , Leo X .'
succeeded

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 . "'

key