question:
The Hanover Zoo is one of the most spectacular and best zoos in Europe.
How many people visited the Hanover Zoo in 2010?

answer: no

question:
On 29 April 1979, the Solar Riser made the first flight in a solar-powered, fully controlled, man carrying flying machine, reaching an altitude of 40 feet (12 m).
When was the first solar powered manned flight made?

answer: yes

question:
Of the third Dalai Lama, China Daily states that the "Ming dynasty showed him special favor by allowing him to pay tribute.
Who did the Ming dynasty showed favors to?

answer: yes

question:
When Estonia was invaded and occupied by the Soviet Union in World War II, the status of the Estonian language changed to the first of two official languages (Russian being the other one).
Who invaded Estonia?

answer:
yes