question:
Although Alexander Graham Bell is most often associated with the invention of the telephone, his interests were extremely varied.
How many patents did Bell co-author?

answer: no

question:
The highest peaks of the Western Alps and Eastern Alps, respectively, are Mont Blanc, at 4,810 m (15,780 ft) and Piz Bernina at 4,049 metres (13,284 ft).
How tall is the peak at Mont Blanc?

answer: yes

question:
This succeeded in increasing the Macintosh's market share somewhat, and provided cheaper hardware for consumers, but hurt Apple financially as existing Apple customers began to buy cheaper clones which cannibalized the sales of Apple's higher-margin Macintosh systems, yet Apple still shouldered the burden of developing the Mac OS platform.
What did Macintosh clones succeed in increasing for Macintosh?

answer: yes

question:
In May 2005, the first high definition video conferencing systems, produced by LifeSize Communications, were displayed at the Interop trade show in Las Vegas, Nevada, able to provide video at 30 frames per second with a 1280 by 720 display resolution.
What year was the first HD video conferencing system displayed?

answer:
yes