question: OPTIONS:
- yes
- no
In a nonpartisan system, no official political parties exist, sometimes reflecting legal restrictions on political parties.
Do official political parties exist in a nonpartisan system?

answer: yes

[Q]: Sentence: On April 9, 2007, it was announced that Apple had sold its one-hundred millionth iPod, making it the biggest selling digital music player of all time. Question: How many iPods did Apple reveal it sold in April of 2007? OPTIONS:
- yes
- no
++++++++++
[A]: yes

Q: Does "In general, patent infringement cases are handled under civil law (e.g., in the United States) but several jurisdictions incorporate infringement in criminal law also (for example, Argentina, China, France, Japan, Russia, South Korea)." provide a valid answer to "What type of law handles patent infringement cases in the US?"?
OPTIONS:
- yes
- no
A: yes

Problem: Does "The prior social structure was one of Polish tribes united into the historic Polish nation under a state ruled by the Piast dynasty, this dynasty appearing circa 850 A.D." answer the question "WHen did the Piast dynasty appear?" OPTIONS:
- yes
- no

A: yes

Does the sentence "The range of evolutionary theories during "the eclipse of Darwinism" included forms of "saltationism" in which new species were thought to arise through "jumps" rather than gradual adaptation, forms of orthogenesis claiming that species had an inherent tendency to change in a particular direction, and forms of neo-Lamarckism in which inheritance of acquired characteristics led to progress." provide a valid answer to the question "What is the term for the belief that species have a tendency to change and adapt in a certain direction?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Though fiercely debated, the restaurant's founder Louis Lassen is credited by the Library of Congress with inventing the hamburger and steak sandwich." provide a valid answer to the question "In what year did Louis' Lunch begin serving fast food in New Haven?" OPTIONS:
- yes
- no

A:
no