Question: How many people visited the exhibition during its four-month run?
About the article "Das Boot", section "Reception".

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The film drew highest critical acclaim and is seen as one of the greatest of all German films.
For its unsurpassed authenticity in tension and realism, it is regarded internationally as pre-eminent among all submarine films.
The film was ranked #25 in "Empire" magazine's "The 100 Best Films Of World Cinema" in 2010.
It currently holds a 98% Fresh rating on Rotten Tomatoes, well into the 32-nd year of its release (as of July 2013).
In late 2007, there was an exhibition about the film "Das Boot", as well as about the real U-Boat "U-96", at the Haus der Geschichte (House of German History) in Bonn.
Over 100,000 people visited the exhibition during its four-month run.
The venue has hosted several exhibitions before its inauguration as a museum.
The first Cardiff Museum Project exhibition, "Moving Stories 1905-2005", opened at the Old Library.
During its 6 month run it attracted 16,873 visits.
The "Cardiff’s War: 1939-1945" exhibition featured at the Old Library in January 2006, attracting 10,390 visits in just 6 weeks.
"River and Rail", how Isambard Kingdom Brunel shaped Cardiff exhibition opened in October 2006.
"Roots to Cardiff" featured at the museum between February and June 2007.
Preparations included interviews with people who would feature in the exhibition, as well as uncovering some interesting objects such as a Gypsy caravan, lent by the Travellers' Education Service.
There is a long tradition of Gypsy families coming to Cardiff as part of their nomadic life.
"Bats, Boots and Balls: the highs and lows of sport in Cardiff", closed in November 2007 with over 14,000 visits.
Voting for Cardiff ’s Sporting Great in the exhibition was heated but the winner was Colin Jackson, followed by Ryan Giggs and Fred Keanor.
"Fury of the Waters: how Cardiff faced the floods" exhibition opened on 15 December 2007.
The exhibition weighed up the evidence for the Great Flood of 1607 being caused by a tsunami or a storm surge.
The exhibition also features the skeleton of Billy the Seal, on loan from National Museum Cardiff.
Over 11,000 people visited the exhibition in the first three months ago and over the Easter holidays the Environment Agency Wales held a Flood Awareness Roadshow in the gallery.
Visitors were able to search on a computer to find out whether their house is at risk of flooding, and took away freebies to make their own ‘emergency flood kit’.
"When We Were Young: growing up in Cardiff" opened in July 2008.
The exhibition brought together a range of stories about growing up in Cardiff over the past 150 years, including work, school, leisure and home life. 
In January 2010, "1001 Inventions" launched a new and much larger traveling exhibition at the Science Museum in London.
Prior to its public opening the entire content of the exhibition was reviewed by an independent panel of expert historians.
More than 400,000 people attended the exhibition during its five-month run at the London Science Museum. 
From November 2008 through October 2009, the GLBT Historical Society sponsored a pop-up museum in the Castro District at the corner of 18th and Castro streets; the space featured an exhibition, "Passionate Struggle: Dynamics of San Francisco's GLBT History," that traced more than a century of the city's LGBT history using documents and artifacts from the society's collections.
The exhibition was curated by Don Romesburg, assistant professor of women's and gender studies at Sonoma State University, and Amy Sueyoshi, associate professor of race and resistance studies and sexuality studies at San Francisco State University, with assistance from a curatorial committee of academics and independent scholars.
Among the objects displayed were a preliminary study for the "Maestrapeace" mural on the façade of the San Francisco Women's Building, the sewing machine used by designer Gilbert Baker to create the first rainbow flag, and the suit worn by openly gay San Francisco Supervisor Harvey Milk when he was assassinated on Nov. 27, 1978.
Approximately 25,000 people from throughout the United States and around the world visited the exhibition during its 11-month run. 
By the early 1850s New York had grown to sufficient size and prominence that the city decided to host a major exhibition of the type that London had pioneered in 1851.
Such early exhibitions were forerunners of the later world’s fairs.
The Exhibition of the Industry of All Nations opened during the term of Mayor Westervelt on July 14, 1853, in a sparsely developed part of the city.
Fortieth and Forty-second streets bounded the fair's four-acre site to the immediate west of the Croton Distributing Reservoir—today’s Bryant Park.
Within New York’s Crystal Palace, designed by Karl Gildemeister, four thousand exhibitors displayed the industrial wares, consumer goods, and artworks of the nation.
Westervelt was President of the Exhibition, which set off one of the first major tourism booms in New York; many hotels were built to handle the influx of visitors.
Over one million people visited the Crystal Palace Exhibition, which closed on November 1, 1854 (in spite of its popularity, the exhibition’s sponsors lost $300,000 on the venture).
The structure remained standing after the fair, and was leased for a variety of purposes before being destroyed by fire on October 5, 1858.