In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: New picture The National Gallery now has a fine _ by the 18th century Dutch painter Jan van Os.This large picture (89.1 cm x 71cm) of flowers and fruit is painted in light bright colours on wood.It is one of the first pictures of this type in the Gallery.The picture is signed and dated 1777 and 1778.It is not unusual for a picture to be dated two years: the artist waited for particular flowers to come out in their different seasons in order to paint them.This picture was given to the Gallery by Miss Violet Churchman in memory of her sister Ida Nancy. It is now on show in Room 25. Special exhibition The exhibition "Painting in Spain During the Late 18th Century" opened in the Sunley Room on 15 March.Recently the Gallery has bought works by three Spanish painters of this period--Paret, Melendez and Francisco Bayeu, who are the focus of the exhibition.These three artists are also joined by Francisco's brother Ramon, by Antonio Gonzalez and two Italians who worked in Spain during these years--Corrado Giaquinto and Giovanni Battista Tiepolo.The exhibition runs until 31 May. Lecture news Lectures will be given along with the special exhibition every Wednesday.On 8 April, Lizzie Barker will discuss the work of Melendez, while on 15 April, Sarah Symmons will lecture on Luis Patter.On 22 and 29 April, Juliet Wilson will talk about Francisco Bayeu.On 25 April, a Saturday, Erika Langmuir will explain how artists often "tell a story" through their pictures.
Answer: Eight.

A: How many artists' paintings are on show at the special exhibition?
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Q: Article: Helicopter Aerial Tour Explore the Grand Cannon from the eyes of the eagle. A wonderful 12- to 15-minute helicopter tour will soar through the canyon for an aerial experience of wonderful views. Our aerial tour is not available anywhere else in the world! Ticket:$120. 00 per person, plus 10% tax. Please call us at 1-888-868-9378 for seasonal rates, specials or to book by phone. Helicopter-Boat Tour Helicopter tour starts at the Grand Canyon, West Side. Take a 4,000-foot fall to the Colorado River below. Helicopters fall 4,000 feet from the canyon side to the banks of the Colorado River where visitors can enjoy a 15- to 20-minute boat ride down the Colorado. Ticket:$150. 00 per person, plus 10% tax. Champagne Helicopter Tour Experience the beauty of the Grand Cannon: Soar above the Hoover Dam and the dead volcanoes. You go aboard a million-dollar helicopter with all forward facing seats allowing 180 degrees of views in air-conditioned comfort. You will see the Hoover Dam, the Colorado River, the Grand Cannon and more! You land to have a champagne picnic lunch at the Grand Cannon. Las Vegas Adventure Tour Helicopter tours to the Grand Canyon West include a wonderful Las Vegas adventure tour. Aerial sightseeing tours originating in Las Vegas, Nevada include breathtaking views of Lake Mead, the Mohave Desert, and the west edge of the Grand Canyon. Aerial tours including the round trip as well as combination tours attract many visitors. Visitors arriving at the Hualapai elation's Grand Cannon West Airport may select one of the activities above.
Answer: 330 dollars.

A: How much should a couple pay for a helicopter-boat tour?
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Q: Article: Summer cools down in August when the city features a lot of jazz to send excitement to any music fan. Beginning August 28, the city hosts a week of jazz performances in a variety of places. This year's annual Jazz Festival in Grant Park will offer a "tribute to New Orleans" with performers from the city, honoring the birthplace of Jazz. Jazz fans who want to be part of the week-long celebration can start with a free concert at Millennium Park's famous Pritzker Pavilion on Monday, August 28 at 6:30 pm. * Other events will include: Tuesday, August 29 -- the Jazz Institute of Chicago presents the Fourth Annual Gala Concert. Wednesday, August 30 -- Heat up Wednesday night with a ride to the best jazz hot spots and learn a bit of history of the genre with the Jazz Institute's Jazz Club Tour, which starts at 6 pm until midnight. For one low price, visit more than a dozen Jazz Clubs. The tour covers nearly every inch of Chicago. *The Chicago Jazz Festival Officially opens with a ticketed performance at the Symphony Center on Thursday, August 31. Then, the festival moves to Grant Park on Friday, September 1, for three days of free music on three stages. The event opens daily at 11 am. * Performance hours are: Jazz on Jackson Stage 12 pm -- 4:30 pm. Jazz & Heritage Family Stage 12:30 pm -- 4:30 pm. Petrillo Music Shell 5 pm -- 9:30 pm. * In addition to the music, the Chicago Jazz Festival features an art fair lying in the rose garden just south of Jackson. The fair offers all kinds of handmade crafts and artwork.
Answer: Jazz Club Tour.

A:
What is special for the Chicago Jazz Festival this year?
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