In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[Q]: The National Guard is a joint activity of the United States Department of Defense ( DoD ) composed of reserve components of the United States Army and the United States Air Force : the Army National Guard and the Air National Guard , respectively .
[A]: The United States National Guard is an organization of the United States Army and the United States Air Force .


[Q]: AirPlay was made available , which allows screen mirroring through an Apple TV or other supported external device allows the screen of the iPod Touch to be mirrored , and was the first generation of the iPod Touch to support it .
[A]: A feature called AirPlay was available , meaning that you can put the iPod Touch 's screen on an Apple TV or other device .


[Q]: In the aftermath of the 1990 Treaty on the Final Settlement with Respect to Germany , the Oder-Neisse line was reaffirmed without any reservation with the German-Polish Border Treaty , signed on 14 November 1990 by re-united Germany and Poland .
[A]:
The Oder-Neisse line was reaffirmed by a reunited Germany in the German-Polish Border Treaty , signed on 14 November 1990 .