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]: a brinicle is a column of ice that forms in seawater.
[EX A]: brinicle

[EX Q]: ernest gary gygax (july 27, 1938 – march 4, 2008) (ipa: ˈgaj.gæks) was an american writer and game designer.
[EX A]: gary gygax

[EX Q]: sophene (armenian: "") was a province of the armenian kingdom and of the roman empire, in the southwest of the kingdom.
[EX A]:
sophene