Task: Question Generation
Input (English): Passage: In the five years since the previous film, Fin has moved to a farm in Kansas named "April's Acres," where he lives with his mother Raye and young son Gil. April is believed dead after being crushed by the wreckage of the space shuttle. Tech mogul Aston Reynolds (based on Tesla, Inc. co-founder and SpaceX founder Elon Musk) has developed a new type of high-speed space travel with his company Astro-X (a play on SpaceX), which was used to save Fin's father, Colonel Gilbert Shepard, from the moon. Astro-X has also developed a technology that is capable of using radio waves to diffuse tornadoes, leading to the end of the sharknado phenomenon.
Fin travels to Molong with his cousin Gemini to meet up with his son Matt, who has returned from deployment in Iraq. Meanwhile, Reynolds has built and is opening a shark-themed hotel featuring a giant tank of sharks. While Matt and his fiancée, Gabrielle, marry and skydive from a plane, a sandstorm tornado develops that cannot be diffused by Astro-X. The tornado absorbs the water and sharks from Reynolds' hotel, creating the first sharknado in five years. The streets of Las Vegas flood, but Fin, Gemini, Gabrielle, and Matt work together to survive the storm until it heads back out into the desert.
Output (English): What led to the end of the sharknado phenomenon?