The Underground Railroad was a complex network of secret routes that slaves traveled to get to freedom. Along the way, there were houses known as "safe houses". They were operated by free people, abolitionists, and Quakers. Without these people, the Umderground Railroad would habe never worked and slaves wouldn't have found freedom.
Answer: It summarizes key points and restates facts.
Explanation: The first printer in history was developed in 1938 by Chester Carlson, an American who invented the process of reproducing images and texts by photocopying machines. In 1953 the first high speed printer was created. It was used on Univac, the first commercial computer manufactured and marketed in the United States. In fact, early printers had a system that provided character printing through impact, a reality that resulted in poor print quality.
Lusitania was an important event in World War I. The death of so many innocent civilians at the hands of the Germans galvanized American support for entering the war, which eventually turned the tide in favor of the Allies. The Lusitania was a British luxury cruise ship.
