Problem: Madonna (entertainer):

Having sold more than 300 million records worldwide, Madonna is recognized as the best-selling female recording artist of all time by Guinness World Records. The Recording Industry Association of America (RIAA) listed her as the best-selling female rock artist of the 20th century and the second best-selling female artist in the United States, with 64.5 million certified albums. According to Billboard, Madonna is the highest-grossing solo touring artist of all time, earning US $1.31 billion from her concerts since 1990. She was ranked at number two, behind only The Beatles, on the Billboard Hot 100 All-Time Top Artists, making her the most successful solo artist in the history of American singles chart. Madonna became one of the five founding members of the UK Music Hall of Fame and was inducted into the Rock and Roll Hall of Fame in her first year of eligibility.

How many certified albums does Madonna have?
---
A: 64.5 million

Problem: Buckingham Palace:

Thus, Buckingham Palace is a symbol and home of the British monarchy, an art gallery and a tourist attraction. Behind the gilded railings and gates which were completed by the Bromsgrove Guild in 1911 and Webb's famous facade, which has been described in a book published by the Royal Collection as looking "like everybody's idea of a palace", is not only a weekday home of the Queen and Prince Philip but also the London residence of the Duke of York and the Earl and Countess of Wessex. The palace also houses the offices of the Queen, Prince Philip, Duke of York, Earl and Countess of Wessex, Princess Royal, and Princess Alexandra, and is the workplace of more than 800 people.

Aside from being the home of the monarchy and a tourist attraction, what else is Buckingham Palace known for?
---
A: art gallery

Problem: Northwestern University:

Northwestern fields 19 intercollegiate athletic teams (8 men's and 11 women's) in addition to numerous club sports. The women's lacrosse team won five consecutive NCAA national championships between 2005 and 2009, went undefeated in 2005 and 2009, added more NCAA championships in 2011 and 2012, giving them 7 NCAA championships in 8 years, and holds several scoring records. The men's basketball team is recognized by the Helms Athletic Foundation as the 1931 National Champion. In the 201011 school year, the Wildcats had one national championship, 12 teams in postseason play, 20 All-Americans, two CoSIDA Academic All-American selections, 8 CoSIDA Academic All0District selections, 1 conference Coach of the Year and Player of the Year, 53 All-Conference and a record 201 Academic All-Big Ten athletes. Overall, 12 of Northwestern's 19 varsity programs had NCAA or bowl postseason appearances.

How many consecutive NCAA championships did the women's larcrosse team win between 2005 and 2009?
---
A: five

Problem: 2008 Sichuan earthquake:

In terms of school casualties, thousands of school children died due to shoddy construction. In Mianyang City, seven schools collapsed, burying at least 1,700 people. At least 7,000 school buildings throughout the province collapsed. Another 700 students were buried in a school in Hanwang. At least 600 students and staff died at Juyuan Elementary School. Up to 1,300 children and teachers died at Beichuan Middle School.

How many schools collapsed in Mianyang City?
---
A:
seven