Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Websites and online media companies in or near the city include All Media Guide, the Weather Underground, and Zattoo. Ann Arbor is the home to Internet2 and the Merit Network, a not-for-profit research and education computer network. Both are located in the South State Commons 2 building on South State Street, which once housed the Michigan Information Technology Center Foundation. The city is also home to the headquarters of Google's AdWords programthe company's primary revenue stream. The recent surge in companies operating in Ann Arbor has led to a decrease in its office and flex space vacancy rates. As of 31 December 2012, the total market vacancy rate for office and flex space is 11.80%, a 1.40% decrease in vacancy from one year previous, and the lowest overall vacancy level since 2003. The office vacancy rate decreased to 10.65% in 2012 from 12.08% in 2011, while the flex vacancy rate decreased slightly more, with a drop from 16.50% to 15.02%.
Name some website or media companies located in Ann Arbor.
A: All Media Guide, the Weather Underground, and Zattoo

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Near the northern Greek borders there are also some Slavicspeaking groups, locally known as Slavomacedonian-speaking, most of whose members identify ethnically as Greeks. Their dialects can be linguistically classified as forms of either Macedonian Slavic or Bulgarian. It is estimated that after the population exchanges of 1923, Macedonia had 200,000 to 400,000 Slavic speakers. The Jewish community in Greece traditionally spoke Ladino (Judeo-Spanish), today maintained only by a few thousand speakers. Other notable minority languages include Armenian, Georgian, and the Greco-Turkic dialect spoken by the Urums, a community of Caucasus Greeks from the Tsalka region of central Georgia and ethnic Greeks from southeastern Ukraine who arrived in mainly Northern Greece as economic migrants in the 1990s.
Where are Slavic speaking groups generally found?
A: northern Greek borders

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According to historian Shaye J. D. Cohen, the status of the offspring of mixed marriages was determined patrilineally in the Bible. He brings two likely explanations for the change in Mishnaic times: first, the Mishnah may have been applying the same logic to mixed marriages as it had applied to other mixtures (Kil'ayim). Thus, a mixed marriage is forbidden as is the union of a horse and a donkey, and in both unions the offspring are judged matrilineally. Second, the Tannaim may have been influenced by Roman law, which dictated that when a parent could not contract a legal marriage, offspring would follow the mother.
How many explanations were there for the lack of change in Mishnaic times?
A: unanswerable

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In the north, the Republic of Novgorod prospered because it controlled trade routes from the River Volga to the Baltic Sea. As Kievan Rus' declined, Novgorod became more independent. A local oligarchy ruled Novgorod; major government decisions were made by a town assembly, which also elected a prince as the city's military leader. In the 12th century, Novgorod acquired its own archbishop Ilya in 1169, a sign of increased importance and political independence, while about 30 years prior to that in 1136 in Novgorod was established a republican form of government - elective monarchy. Since then Novgorod enjoyed a wide degree of autonomy although being closely associated with the Kievan Rus.
When was Novgorad established as a democrat form of government?
A:
unanswerable