QUES: Q: How much did the population of the Americas decrease after first contact with the Europeans?
A: Although the exact pre-contact population of the Americas is unknown, scholars estimate that Native American populations diminished by between 80 and 90% within the first centuries of contact with Europeans.
Does the answer answer the question? OPTIONS:
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ANS: yes

Does "Sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction (dispersal, movement of young away from natal area)." contain the correct answer to "What are non=migratory birds called?"
OPTIONS:
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A: no

question: OPTIONS:
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In addition to their abstract properties, group theorists also study the different ways in which a group can be expressed concretely (its group representations), both from a theoretical and a computational point of view.
When was the group notion summed up and solidly settled?

answer: no

[Q]: Sentence: For example, the U.S. feminist movement involved new practices that produced a shift in gender relations, altering both gender and economic structures. Question: What is this cultural movement called that involves a shift in gender relations mainly involving women? OPTIONS:
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++++++++++
[A]: yes

Q: Does "On the next page he recorded the wolf as Canis lupus, which means "Dog-wolf"." provide a valid answer to "What 1982 publication listed regular family dogs under wolves?"?
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A: no

Q: Does "Regular local trains to all areas surrounding Utrecht also depart from Utrecht Centraal; and service several smaller stations: Utrecht Lunetten, Utrecht Vaartsche Rijn, Utrecht Overvecht, Utrecht Leidsche Rijn, Utrecht Terwijde, Utrecht Zuilen and Vleuten." provide a valid answer to "where to regular local trains provide service"?
OPTIONS:
- yes
- no
A:
yes