纳尔逊·曼德拉被誉为南非的解放者，他结束了种族隔离制度。

Nelson Mandela is hailed as South Africa's ___emancipator who ended apartheid.

林肯总统作为奴隶的解放者而被历史铭记。

President Lincoln is remembered as the great ___emancipator of enslaved people.