question:
Season four premiered on January 18, 2005; this was the first season of the series to be aired in high definition, although the finale of season three was also aired in high definition.
How many contestants auditioned for the fourth season of American Idol?

answer: no

question:
The bel (B) and the smaller decibel (dB) are units of measurement of sound intensity invented by Bell Labs and named after him.
What lab invented the term "bel."

answer: yes

question:
Copper rose over speculations that production in southwestern China may be affected, and oil prices dropped over speculations that demand from China would fall.
What did the Shanghai Stock Exchange do?

answer: no

question:
The causes of the Franco-Prussian War are deeply rooted in the events surrounding the unification of Germany.
What established the European balance of power in 1815?

answer:
no