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]: hexameter is a metrical line of verse.
[EX A]: hexameter

[EX Q]: the corruption perceptions index is an index that shows how corrupt certain countries are.
[EX A]: corruption perceptions index

[EX Q]: mozambique, officially the republic of mozambique, is a country in southeastern africa.
[EX A]:
mozambique