The following are stories and questions about them. Each story is followed by a question and answer to a given question.

Story: North Rhine-Westphalia (, , commonly shortened to NRW) is the most populous state of Germany, with a population of approximately 18 million, and the fourth largest by area. Its capital is Düsseldorf; the largest city is Cologne. Four of Germany's ten largest cities—Cologne, Düsseldorf, Dortmund, and Essen—are located within the state, as well as the second largest metropolitan area on the European continent, Rhine-Ruhr. 

North Rhine-Westphalia was formed in 1946 as a merger of the provinces of North Rhine and Westphalia, both formerly parts of Prussia, and the Free State of Lippe. It makes up almost a quarter of the population and a quarter of the economy of Germany. 

The first written account of the area was by its conqueror, Julius Caesar, the territories west of the Rhine were occupied by the Eburones and east of the Rhine he reported the Ubii (across from Cologne) and the Sugambri to their north. The Ubii and some other Germanic tribes such as the Cugerni were later settled on the west side of the Rhine in the Roman province of Germania Inferior. Julius Caesar conquered the tribes on the left bank, and Augustus established numerous fortified posts on the Rhine, but the Romans never succeeded in gaining a firm footing on the right bank, where the Sugambri neighboured several other tribes including the Tencteri and Usipetes. North of the Sigambri and the Rhine region were the Bructeri.

Question: which German state is has the highest population?
Answer:NRW

Question: is that an acronym?
Answer:Yes

Question: what does it stand for?
Answer:North Rhine-Westphalia

Question: how many people live there?
Answer:about 18 million

Question: when was it created?
Answer:1946

Question: does it play a large part in the country's commerce?
Answer:Yes

Question: how large a part?
Answer:a quarter of the economy

Question: when it was created did it merge two areas together?
Answer:Yes

Question: what were they?
Answer:North Rhine and Westphalia

Question: who is the leader of Rome in the article?
Answer:Julius Caesar

Question: why is he significant to the area?
Answer:he wrote the first written account of the area

Question: anything else?
Answer:
he conquered it