What change should be made to sentence 18?

Landon’s German teacher has assigned a research project on the culture and history of Germany. Landon has made a poster and written detailed captions for each set of pictures on the poster. He would like your help revising and improving the captions.  After you read Landon’s captions, answer questions below. Berlin (1) For almost 30 years, the Berlin Wall divided Berlin in two. (2) On November 9, 1989, citizens from both sides of the city joined together to break down the wall and reunite the city. (3) Today, most of the wall has fallen, but a line of bricks snakes across the city, marking... Show more

Landon’s German teacher has assigned a research project on the culture and history of Germany. Landon has made a poster and written detailed captions for each set of pictures on the poster. He would like your help revising and improving the captions. 
After you read Landon’s captions, answer questions below.

Berlin
(1) For almost 30 years, the Berlin Wall divided Berlin in two. (2) On November 9, 1989, citizens from both sides of the city joined together to break down the wall and reunite the city. (3) Today, most of the wall has fallen, but a line of bricks snakes across the city, marking its old path.
(4) Although bombing during World War II destroyed most of Berlins buildings, the city has been rebuilt as a cultural center. (5) It has art, history, and science museums, as well as famous historical monuments.
(6) The majestic Brandenburg Gate was built in 1791 as a symbols of peace. (7) For many years, it was part of the Berlin Wall and reminded people of the divisions between east and west. (8) Today, the Brandenburg Gate symbolizes reunification and freedom. (9) Near the Brandenburg Gate is the German parliament building, called the Reichstag. (10) It was built in 1894 and was at the center of many important events in German politics. (11) Today, visitors can take an elevator up to the sparkling glass dome at the top of the Reichstag for a view of the city.
Ich bin ein Berliner
(12) On June 26, 1963, President John F. Kennedy visited West Berlin. (13) His visit took place a few years after the Berlin Wall was built and tensions between the United States and Communist East Germany were running high. (14) He gave an inspiring speech about freedom and democracy to the people of democratic West Berlin that ended with words of unity: “Ich bin ein Berliner.” (15) He meant to say, “I am a citizen of Berlin,” but his words really meant, “I am a doughnut.” (16) A Berliner is a jelly doughnut popular in Germany. (17) The Germans in the audience appreciated President Kennedy’s support, and cheered his message of freedom enthusiastically.
Cuisine
(18) German cuisine is known for its hearty, meat and potato dishes. (19) Families often enjoy a rich Sunday dinner of roast meat, potatoes, and cabbage. (20) A typical Sunday dinner might feature juicy Rinderrouladen, creamy Kartoffelpuree, and sweet Apfelkuchen. (21) In English, that would be stuffed beef rolls, mashed potatoes, and apple cake.
(22) Germans eat their heaviest meal of the day at lunchtime. (23) School cafeterias usually serve hearty stews and side dishes. (24) For dinner, families often eat thin slices of whole wheat bread with sausage, sliced meat, and cheese.
(25) Many Germans enjoy late afternoon Kaffee. (26) They visit a neighborhood café and relax with a cup of coffee and slice of creamy, rich cake. (27) Bakeries dot the streets of German towns and cities, selling from small sandwiches to rich pastries. (28) The Amerikaner cookie, a bakery favorite, is a cakey sugar cookie topped with a vanilla and chocolate glaze. (29) The Americaner got its name because it looks like New York City’s famous black and white cookies.

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