question: OPTIONS:
- yes
- no
Although hydraulic freight elevators exist, electric elevators are more energy efficient for the work of freight lifting.[citation needed]
How do freight elevators differ from passenger elevators?

answer: no

[Q]: Sentence: Patents have been criticized in the developing world, as they are thought to reduce access to existing medicines. Question: Why are patents criticized? OPTIONS:
- yes
- no
++++++++++
[A]: yes

Q: Does "David Cook was taken to the hospital after the top-nine performance show due to heart palpitations and high blood pressure." provide a valid answer to "What song did David Cook sing on American Idol during the week of the top ten?"?
OPTIONS:
- yes
- no
A: no

Problem: Does "Darwin went to Edinburgh University in 1825 to study medicine." answer the question "What was Darwin originally studying at university?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Meanwhile, the authorities in Glasgow, Scotland successfully petitioned the government to pass the Glasgow Police Act establishing the City of Glasgow Police in 1800." provide a valid answer to the question "What was Ireland's police force called?" OPTIONS:
- yes
- no

A: no

Does the sentence "In prairie ecosystems, American bison, greater prairie chickens, badgers, and armadillo are common, and some of the nation's largest prairie dog towns inhabit shortgrass prairie in the state's panhandle." provide a valid answer to the question "What types of deer does Oklahoma have a lot of?" OPTIONS:
- yes
- no

A:
no