TASK DEFINITION: In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
PROBLEM: The wavelength is the distance from one peak of the wave's electric field (wave's peak / crest) to the next, and is inversely proportional to the frequency of the wave. The distance a radio wave travels in one second, in a vacuum, is 299,792,458 meters (983,571,056 ft) which is the wavelength of a 1 hertz radio signal. A 1 megahertz radio signal has a wavelength of 299.8 meters (984 ft).

SOLUTION: the wave length of radio wave is 1m its frequency is

PROBLEM: The Hangover is a 2009 American comedy film directed by Todd Phillips, co-produced with Daniel Goldberg, and written by Jon Lucas and Scott Moore. It is the first installment in The Hangover trilogy. The film stars Bradley Cooper, Ed Helms, Zach Galifianakis, Heather Graham, Justin Bartha, and Jeffrey Tambor. It tells the story of Phil Wenneck, Stu Price, Alan Garner, and Doug Billings, who travel to Las Vegas for a bachelor party to celebrate Doug's impending marriage. However, Phil, Stu, and Alan wake up with Doug missing and no memory of the previous night's events, and must find the groom before the wedding can take place.

SOLUTION: film about a stag night in las vegas

PROBLEM: The seventh and final season of the American mystery drama television series Pretty Little Liars, based on the books of the same name by Sara Shepard, was renewed on June 10, 2014 for two additional seasons, making the show Freeform's longest running original series.

SOLUTION:
how many seasons pretty little liars will there be