Input: Article: In the US Air Force, the distinction between bombers, fighters that are actually fighter-bombers, and attack aircraft has become blurred. Many attack aircraft, even ones that look like fighters, are optimized to drop bombs, with very little ability to engage in aerial combat. Many fighter aircraft, such as the F-16, are often used as 'bomb trucks', despite being designed for aerial combat. Perhaps the one meaningful distinction at present is the question of range: a bomber is generally a long-range aircraft capable of striking targets deep within enemy territory, whereas fighter bombers and attack aircraft are limited to 'theater' missions in and around the immediate area of battlefield combat. Even that distinction is muddied by the availability of aerial refueling, which greatly increases the potential radius of combat operations. The US, Russia, and the People's Republic of China operate strategic bombers.

Now answer this question: What types of aircraft are typically limited to close proximity of battlefield conflict by the USAF? 

Output: fighter bombers and attack aircraft

Input: Article: Some Christian writers considered the possibility that pagan commentators may have mentioned this event, mistaking it for a solar eclipse - although this would have been impossible during the Passover, which takes place at the full moon. Christian traveller and historian Sextus Julius Africanus and Christian theologian Origen refer to Greek historian Phlegon, who lived in the 2nd century AD, as having written "with regard to the eclipse in the time of Tiberius Caesar, in whose reign Jesus appears to have been crucified, and the great earthquakes which then took place"

Now answer this question: Which Greek historian wrote about these natural occurrences?

Output: Greek historian Phlegon

Input: Article: From the 1950s on, the students were also used for unpaid work at schools, where they cleaned and performed repairs. This practice has continued in the Russian Federation, where up to 21 days of the summer holidays is sometimes set aside for school works. By law, this is only allowed as part of specialized occupational training and with the students' and parents' permission, but those provisions are widely ignored. In 2012 there was an accident near city of Nalchik where a car killed several pupils cleaning up a highway shoulder during their "holiday work" as well as their teacher who was supervising them.

Now answer this question: When were students used as workers?

Output:
1950s