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.

Input: Consider Input: the artemision zeus is a greek bronze statue.

Output: artemision zeus


Input: Consider Input: 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 orléans, younger brother of louis xiv.

Output: elisabeth charlotte of the palatinate


Input: Consider Input: an explosion is a fast increase in volume and increase in energy made available.


Output: explosion