TASK DEFINITION: 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.
PROBLEM: aesthetics is a branch of philosophy.

SOLUTION: aesthetics

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

SOLUTION: sahel

PROBLEM: ugley is a village and civil parish in uttlesford, essex, england.

SOLUTION:
ugley