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.

[Q]: dennis kearney (1847–1907) was an american politician who was himself an immigrant from ireland.
[A]: dennis kearney


[Q]: renty is a commune.
[A]: renty


[Q]: the 1st millennium bc was the last millennium before the common era.
[A]:
1st millennium bc