question: OPTIONS:
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By the time of the Uruk period (c. 41002900 BC calibrated), the volume of trade goods transported along the canals and rivers of southern Mesopotamia facilitated the rise of many large, stratified, temple-centered cities (with populations of over 10,000 people) where centralized administrations employed specialized workers.
How many people lived in the cities?

answer: yes

[Q]: Sentence: On January 11, 2010, Simon Cowell announced that he was leaving the show to pursue introducing the American version of his show The X Factor to the USA for 2011. Question: What year did Simon Cowell announce that he was leaving American Idol? OPTIONS:
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++++++++++
[A]: yes

Q: Does "however, to go down, it opens the valve so that the air can pressurize the top of the "shaft", allowing the cab to go down by its own weight." provide a valid answer to "What does this type of elevator use to propel the cage?"?
OPTIONS:
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A: no

Problem: Does "Line 2 opened in December 2008, serving Eje 4 Sur, line 3 opened in February 2011, serving Eje 1 Poniente, and line 4 opened in April 2012 connecting the airport with San Lazaro and Buenavista Station at Insurgentes." answer the question "When did the second line of Metrobus open?" OPTIONS:
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A: yes

Does the sentence "The human brain has been estimated to contain approximately 100 trillion synapses; even the brain of a fruit fly contains several million." provide a valid answer to the question "How many synapses does the human brain supposedly contain?" OPTIONS:
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A: yes

Does the sentence "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." provide a valid answer to the question "What year was the first HD video conferencing system displayed?" OPTIONS:
- yes
- no

A:
yes