Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Which English town shares its name with the state capital of Delaware?
delaware

Which country had a parliament called the Duma?
state duma

June 4, 1723 saw the birth, in Kirkcaldy, Scotland, of what social philosopher and pioneer of economics, who wrote such weighty tomes as The Theory of Moral Sentiments and An Inquiry into the Nature and Causes of the Wealth of Nations?

the wealth of nations