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]: veronika marchenko is a russian activist.
[EX A]: veronika marchenko

[EX Q]: the social democratic party of germany (german sozialdemokratische partei deutschlands or spd) is the oldest political party in germany that still exists, having been formed on 23 may 1863.
[EX A]: social democratic party of germany

[EX Q]: verismo is a word which refers to a type of literature and a type of opera that was popular towards the end of the 19th century and the beginning of the 20th century.
[EX A]:
verismo