Input: Article: In June 1940, a German prisoner of war was overheard boasting that the British would never find the Knickebein, even though it was under their noses. The details of the conversation were passed to an RAF Air Staff technical advisor, Dr. R. V. Jones, who started an in-depth investigation which discovered that the Luftwaffe's Lorenz receivers were more than blind-landing devices. Jones therefore began a search for the German beams. Avro Ansons of the Beam Approach Training Development Unit (BATDU) were flown up and down Britain fitted with a 30 MHz receiver to detect them. Soon a beam was traced to Derby (which had been mentioned in Luftwaffe transmissions). The first jamming operations were carried out using requisitioned hospital electrocautery machines. A subtle form of distortion was introduced. Up to nine special transmitters directed their signals at the beams in a manner that widened its path, negating its ability to accurately locate targets. Confidence in the device was diminished by the time the Luftwaffe decided to launch large-scale raids. The counter operations were carried out by British Electronic Counter Measures (ECM) units under Wing Commander Edward Addison, No. 80 Wing RAF. The production of false radio navigation signals by re-transmitting the originals was a technique known as masking beacons (meacons).

Now answer this question: The first jamming operation was carried out using what machines?

Output: electrocautery machines

Input: Article: Chopin's music was used in the 1909 ballet Chopiniana, choreographed by Michel Fokine and orchestrated by Alexander Glazunov. Sergei Diaghilev commissioned additional orchestrations—from Stravinsky, Anatoly Lyadov, Sergei Taneyev and Nikolai Tcherepnin—for later productions, which used the title Les Sylphides.

Now answer this question: Who choreographed a ballet which included Chopin's work?

Output: Michel Fokine

Input: Article: In the first major change to the judging panel, a fourth judge, Kara DioGuardi, was introduced. This was also the first season without executive producer Nigel Lythgoe who left to focus on the international versions of his show So You Think You Can Dance. The Hollywood round was moved to the Kodak Theatre for 2009 and was also extended to two weeks. Idol Gives Back was canceled for this season due to the global recession at the time.

Now answer this question: Who was brought in as a new judge during American Idols eighth season?

Output:
Kara DioGuardi