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:
tricity is a big centre for tourism.
answer:
tricity


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


question:
the flag of singapore consists of two horizontal halves, red above white.
answer:

flag of singapore