Problem: Detroit:

As in other major American cities in the postwar era, construction of an extensive highway and freeway system around Detroit and pent-up demand for new housing stimulated suburbanization; highways made commuting by car easier. In 1956, Detroit's last heavily used electric streetcar line along the length of Woodward Avenue was removed and replaced with gas-powered buses. It was the last line of what had once been a 534-mile network of electric streetcars. In 1941 at peak times, a streetcar ran on Woodward Avenue every 60 seconds.

In which year was the last electric streetcar line removed?
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A: 1956


Problem: On August 30, 2015, West was presented with the Michael Jackson Video Vanguard Award at the MTV Video Music Awards. In his acceptance speech, he stated, "Y'all might be thinking right now, 'I wonder did he smoke something before he came out here?' And the answer is: 'Yes, I rolled up a little something. I knocked the edge off.'" At the end of his speech, he announced, "I have decided in 2020 to run for president."
What award did Kanye capture at the 2015 MTV VMAs?
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Answer: Michael Jackson Video Vanguard Award


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
A cappella music was originally used in religious music, especially church music as well as anasheed and zemirot. Gregorian chant is an example of a cappella singing, as is the majority of secular vocal music from the Renaissance. The madrigal, up until its development in the early Baroque into an instrumentally-accompanied form, is also usually in a cappella form. Jewish and Christian music were originally a cappella,[citation needed] and this practice has continued in both of these religions as well as in Islam.
In what practice what most of the vocal music A capella?
A: unanswerable


Context and question: In January 2013, Destiny's Child released Love Songs, a compilation album of the romance-themed songs from their previous albums and a newly recorded track, "Nuclear". Beyoncé performed the American national anthem singing along with a pre-recorded track at President Obama's second inauguration in Washington, D.C. The following month, Beyoncé performed at the Super Bowl XLVII halftime show, held at the Mercedes-Benz Superdome in New Orleans. The performance stands as the second most tweeted about moment in history at 268,000 tweets per minute. At the 55th Annual Grammy Awards, Beyoncé won for Best Traditional R&B Performance for "Love on Top". Her feature-length documentary film, Life Is But a Dream, first aired on HBO on February 16, 2013. The film, which she directed and produced herself, featured footage from her childhood, her as a mother and businesswoman, recording, rehearsing for live performances, and her return to the spotlight following Blue Ivy's birth. Its DVD release in November 2013 was accompanied by footage from the Revel Presents: Beyoncé Live concerts and a new song, "God Made You Beautiful". In February 2013, Beyoncé signed a global publishing agreement with Warner/Chappell Music, which would cover her future songwriting and then-upcoming studio album.
When did Destiny's Child release its album "Love Songs"?
Answer: January 2013


Question: The light from LEDs can be modulated very quickly so they are used extensively in optical fiber and free space optics communications. This includes remote controls, such as for TVs, VCRs, and LED Computers, where infrared LEDs are often used. Opto-isolators use an LED combined with a photodiode or phototransistor to provide a signal path with electrical isolation between two circuits. This is especially useful in medical equipment where the signals from a low-voltage sensor circuit (usually battery-powered) in contact with a living organism must be electrically isolated from any possible electrical failure in a recording or monitoring device operating at potentially dangerous voltages. An optoisolator also allows information to be transferred between circuits not sharing a common ground potential.
Is there an answer to this question: What is an example of a device that uses not free space optic communications?

Answer: unanswerable


Seattle's foreign-born population grew 40% between the 1990 and 2000 censuses. The Chinese population in the Seattle area has origins in mainland China, Hong Kong, Southeast Asia, and Taiwan. The earliest Chinese-Americans that came in the late 19th and early 20th centuries were almost entirely from Guangdong province. The Seattle area is also home to a large Vietnamese population of more than 55,000 residents, as well as over 30,000 Somali immigrants. The Seattle-Tacoma area is also home to one of the largest Cambodian communities in the United States, numbering about 19,000 Cambodian Americans, and one of the largest Samoan communities in the mainland U.S., with over 15,000 people having Samoan ancestry. Additionally, the Seattle area had the highest percentage of self-identified mixed-race people of any large metropolitan area in the United States, according to the 2000 United States Census Bureau. According to a 2012 HistoryLink study, Seattle's 98118 ZIP code (in the Columbia City neighborhood) was one of the most diverse ZIP Code Tabulation Areas in the United States.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What other group of people does Seattle have the largest percentage of in the US?
Ah, so..
self-identified mixed-race