question:
Solar energy may be used in a water stabilisation pond to treat waste water without chemicals or electricity.
For what reason would solar energy be used in a water stabilisation pond?

answer: yes

question:
Christoph Waltz has signed on for two more films in the series, but his return depends on whether or not Craig will again portray Bond.
Christoph Waltz's appearance in future Bond movies is contingent on the appearance of which other actor?

answer: yes

question:
The Triple Entente was the name given to the loose alignment between the United Kingdom, France, and Russia after the signing of the Anglo-Russian Entente in 1907.
What is The Triple Entente?

answer: yes

question:
Parral remained an important economic and cultural center for the next 300 years.
How many years was Parral an important economic and cultural center?

answer:
yes