You will be given a definition of a task first, then some input of the task.
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 birth of', Sentence: 'Never mind that Christmas does not celebrate the actual birth date of Jesus , that " the Christians stole Christmas " from the pagans , as Leonard Peikoff points out in his classic essay , " Why Christmas Should Be More Commercial . "'
Output:
birth