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 Input:
blairlogie is at the base of the great cliff of dumyat between stirling and menstrie was one of central scotland's earliest conservation villages.

Ex Output:
blairlogie


Ex Input:
dominoes is a game played with small tiles called dominoes.

Ex Output:
dominoes


Ex Input:
zinc phosphate is a chemical compound.

Ex Output:

zinc phosphate