Task: Question Generation
Input (English): Passage: A flying saucer is seen in the sky above the countryside by various eyewitnesses, including an American woman driving in her car. She crashes after being blinded by the craft's landing lights and deafened by its loud propulsion system. A stranger walks up to the car and sees that she is injured.
The stranger later enters a country inn very near where the sighting and accident took place. He is able to read people's thoughts, and when asked says he has no name. He also asserts that he is responsible for saving the life of Susan North, the car accident victim. She later walks into the inn a little dazed, but with her crash wounds nearly healed. After the mysterious stranger explains that he comes from the planet Venus, a guest at the inn, Arthur Walker, a high-ranking government official (and Susan's fiancé), calls the war ministry. With permission, Dr Meinard examines the stranger from Venus and says that he has no detectable pulse. The area surrounding the inn is quickly cordoned-off by the government.
Journalist Charles Dixon tries to learn more about the man from Venus. Dixon discovers that the stranger is able to speak multiple human languages, and that his people have learned quite a bit about humanity by listening to our radio broadcasts and viewing our television transmissions. He also explains how Venusians use 'magnetic brilliance' for their spaceship propulsion, supplied by the magnetic energy fields of the other planets as they revolve in their various orbits.
Output (English): Who explains that Venusians use "magnetic brilliance for spaceship propulsion?