Text: Although Concorde and the Tu-144 were the first aircraft to carry commercial passengers at supersonic speeds, they were not the first or only commercial airliners to break the sound barrier. On 21 August 1961, a Douglas DC-8 broke the sound barrier at Mach 1.012 or 1,240 km/h (776.2 mph) while in a controlled dive through 41,088 feet (12,510 m). The purpose of the flight was to collect data on a new leading-edge design for the wing. A China Airlines 747 may have broken the sound barrier in an unplanned descent from 41,000 ft (12,500 m) to 9,500 ft (2,900 m) after an in-flight upset on 19 February 1985. It also reached over 5g.

Question: can a commercial jet break the sound barrier?
[separator]
Answer: yes

Text: Robin Williams (1951--2014) was an American actor and comedian who throughout the course of his career won numerous awards, including an Academy Award for Best Supporting Actor for his role in Good Will Hunting (1997). He also won six Golden Globe Awards, including Best Actor -- Motion Picture Musical or Comedy for his roles in Good Morning, Vietnam (1987), The Fisher King (1991) and Mrs. Doubtfire (1993), along with the Cecil B. DeMille award in 2005.

Question: did robin williams ever won an academy award?
[separator]
Answer: yes

Text: They reasoned that other flowers grown there--such as the bougainvillea, hibiscus and poinciana--had already been chosen as the national flowers of other countries. The yellow elder, on the other hand, was unclaimed by other countries (although it is now also the national flower of the United States Virgin Islands) and also the yellow elder is native to the family islands.

Question: is the bahamas part of the us virgin islands?
[separator]
Answer: no

Text: Expo 2020 will be held in Dubai, United Arab Emirates, as a Registered Exposition.

Question: do we still have the world's fair?
[separator]
Answer:
yes