Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

[EX Q]: elisabeth charlotte of the palatinate, daughter of france by marriage (27 may 1652 - 8 december 1722) was a german princess and the wife of philippe of france, duke of orleans, younger brother of louis xiv.
[EX A]: elisabeth charlotte of the palatinate

[EX Q]: "the raven" is a narrative poem by american writer edgar allan poe, first published in january 1845.
[EX A]: the raven

[EX Q]: extreme rules (2015) was a professional wrestling pay-per-view show made by wwe.
[EX A]:
extreme rules (2015)