Question: The Austrian engineer Paul Eisler invented the printed circuit as part of a radio set while working in England around 1936. Around 1943 the USA began to use the technology on a large scale to make proximity fuses for use in World War II. After the war, in 1948, the USA released the invention for commercial use. Printed circuits did not become commonplace in consumer electronics until the mid-1950s, after the Auto-Sembly process was developed by the United States Army. At around the same time in Britain work along similar lines was carried out by Geoffrey Dummer, then at the RRDE.
Is there an answer to this question: When was the printed circuit released for commercial use in the U.S.?

Answer: 1948

Question: Industries slowly brought the city and its inhabitants back to a renewed vitality and jobs attracted new residents. As the city's commerce improved, residents worked to restore or create community institutions. In 1865, the Avery Normal Institute was established by the American Missionary Association as the first free secondary school for Charleston's African American population. General William T. Sherman lent his support to the conversion of the United States Arsenal into the Porter Military Academy, an educational facility for former soldiers and boys left orphaned or destitute by the war. Porter Military Academy later joined with Gaud School and is now a university-preparatory school, Porter-Gaud School.
Is there an answer to this question: What general supported the conversion of a UN Arsenal into Porter Military Academy?

Answer: unanswerable

Question: In 2013 tourism within the state from local citizens accounted for 39.9% of tourists, the second highest originating location for tourists to Tennessee is the state of Georgia, accounting for 8.4% of tourists.:17 Forty-four percent of stays in the state were "day trips", 25% stayed one night, 15% stayed two nights, and 11% stayed 4 or more nights. The average stay was 2.16 nights, compared to 2.03 nights for the US as a whole.:40 The average person spent $118 per day: 29% on transportation, 24% on food, 17% on accommodation, and 28% on shopping and entertainment.:44
Is there an answer to this question: Which other state sent Tennessee the most tourists in 2013?

Answer: Georgia

Question: Houston was founded in 1836 on land near the banks of Buffalo Bayou (now known as Allen's Landing) and incorporated as a city on June 5, 1837. The city was named after former General Sam Houston, who was president of the Republic of Texas and had commanded and won at the Battle of San Jacinto 25 miles (40 km) east of where the city was established. The burgeoning port and railroad industry, combined with oil discovery in 1901, has induced continual surges in the city's population. In the mid-twentieth century, Houston became the home of the Texas Medical Centerthe world's largest concentration of healthcare and research institutionsand NASA's Johnson Space Center, where the Mission Control Center is located.
Is there an answer to this question: When was the City of Houston unincorporated?

Answer:
unanswerable