input: [Event Date:] 27th May, 1940 [Event Title:] Chroma Keying (Green Screen) [Event Description:] 
output: Chroma key compositing is a technique for compositing two images together. This is revolutionary technique that has changed the face of film&editing industry. It was first developed in the 1930's however it was know as the blue screen. They were first used to create special effects for The Thief of Bagdad (1940). However The credit for development of the bluescreen is given to Larry Butler, who won the Academy Award for special effects for The Thief of Bagdad.