Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The median income for a household in the city was $26,969, and the median income for a family was $31,997. Males had a median income of $25,471 versus $23,863 for females. The per capita income for the city was $15,402. About 19.1% of families and 23.6% of the population were below the poverty line, including 29.1% of those under age 18 and 18.9% of those age 65 or over.
What was the median income for a family in the city?
A: $31,997

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Early web browsers supported only a very simple version of HTML. The rapid development of proprietary web browsers led to the development of non-standard dialects of HTML, leading to problems with interoperability. Modern web browsers support a combination of standards-based and de facto HTML and XHTML, which should be rendered in the same way by all browsers.
What problems arose after the development of modern web browsers?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Northwestern is a large, residential research university. Accredited by the North Central Association of Colleges and Schools and the respective national professional organizations for chemistry, psychology, business, education, journalism, music, engineering, law, and medicine, the university offers 124 undergraduate programs and 145 graduate and professional programs. Northwestern conferred 2,190 bachelor's degrees, 3,272 master's degrees, 565 doctoral degrees, and 444 professional degrees in 2012–2013.
How many master's degrees did Northwestern confer during the 2013-2014 school term?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Efforts to identify the origins of Ashkenazi Jews through DNA analysis began in the 1990s. Currently, there are three types of genetic origin testing, autosomal DNA (atDNA), mitochondrial DNA (mtDNA), and Y-chromosomal DNA (Y-DNA). Autosomal DNA is a mixture from an individual's entire ancestry, Y-DNA shows a male's lineage only along his strict-paternal line, mtDNA shows any person's lineage only along the strict-maternal line. Genome-wide association studies have also been employed to yield findings relevant to genetic origins.
When did efforts begin to try and identify the origins of Ashkenazi Jews through DNA analysis?
A:
the 1990s