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: the sahel is a narrow belt of land in west africa.

A: sahel
****
Q: jennifer warnes is an american singer.

A: jennifer warnes
****
Q: vittoria colonna (1490-1547), marchioness of pescara, was an italian noblewoman and poet.

A:
vittoria colonna
****