instruction:
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.
question:
joe the plumber, nickname of "samuel joseph "joe" wurzelbacher", (born december 3, 1973 in toledo, ohio) is an american commentator, motivational speaker and political activist.
answer:
joe the plumber


question:
the corruption perceptions index is an index that shows how corrupt certain countries are.
answer:
corruption perceptions index


question:
a thermodynamic state is the macroscopic condition of a thermodynamic system as described by its particular thermodynamic parameters.
answer:

thermodynamic state