In this task, you are given a piece of an article. Your task is to generate a short summary of the text. Try to give the summary in just one sentence.

Ex Input:
Microsoft Corp's Windows 8.1 is finally available in the market.

Ex Output:
Bashar al-Assad said Syria would defend itself against any aggression.

Ex Input:
US President Barack Obama in an interview aired Friday said Russia must ''move back'' its troops from the Ukraine border and start negotiating, AFP reported.

Ex Output:
Barack Obama said Russia must move back its troops.

Ex Input:
The number of free apps available in the App Store and through Google Play continues to rise.

Ex Output:
TV pitchman Kevin Trudeau was ordered to jail.