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:
accountancy or accounting is the job of sharing financial information about a business to managers and shareholders (people who have invested in the business).

Ex Output:
accountancy


Ex Input:
spintronics is a kind of electronics that uses the tiny magnetic fields that come from electrons as well as their electric charge.

Ex Output:
spintronics


Ex Input:
jericho is a very old city in the west bank.

Ex Output:

jericho