question:
On the other hand, Mexico City is also home to large communities of expatriates and immigrants, most notably from the rest of North America (U.S. and Canada), from South America (mainly from Argentina and Colombia, but also from Brazil, Chile, Uruguay and Venezuela), from Central America and the Caribbean (mainly from Cuba, Guatemala, El Salvador, Haiti and Honduras); from Europe (mainly from Spain, Germany and Switzerland, but also from Czech Republic, Hungary, France, Italy, Ireland, the Netherlands, Poland and Romania), from the Middle East (mainly from Egypt, Lebanon and Syria); and recently from Asia-Pacific (mainly from China and South Korea).
What countries do most of the South American immigrants come from?

answer: yes

question:
Steel is an example of an interstitial alloy, because the very small carbon atoms fit into interstices of the iron matrix.
What is the name of one interstitial alloy?

answer: yes

question:
He had a small, basic golf facility installed at Camp David, and became close friends with the Augusta National Chairman Clifford Roberts, inviting Roberts to stay at the White House on several occasions.
What was Clifford Roberts by profession?

answer: no

question:
A product must pass the threshold for cost-effectiveness if it is to be approved.
What threshold must a drug pass before it is approved?

answer:
yes