Task: Question Generation
Input (English): Context : Virgin Galactic's founder, Sir Richard Branson, had initially suggested that he hoped to see a maiden flight by the end of 2009, but this date has been delayed on a number of occasions, most recently by the October 2014 in-flight loss of SpaceShipTwo VSS Enterprise. 
Subject : Virgin Galactic 
Relation : parent company
Output (English): What is Virgin Galactic's parent company?