Q: Does "Ethnohistory uses both historical and ethnographic data as its foundation." provide a valid answer to "What does ethnohistory use both historical and ethnographic data as?"?
A: yes

Q: Does "The Australian economy was facing the early 1990s recession." provide a valid answer to "What was the Australian unemployment rate in 1992?"?
A: no

Q: Does "Today's aircraft carriers are so expensive that nations which operate them risk significant political, economic, and military impact if a carrier is lost, or even used in conflict." provide a valid answer to "Why do nations risk significant political impacts if a carrier is lost or even used in conflict?"?
A: yes

Q: Does "Worms, as well as potential vulnerabilities, were noted in February 2006, which led some industry analysts and anti-virus companies to issue warnings that Apple's Mac OS X is not immune to malware." provide a valid answer to "What were Apple support staff initially instructed not to assist with concerning malware?"?
A:
no