Complex sentence: The first known piece of television science fiction anywhere in the world was produced by the BBC on February 11,1938, a thirty-five-minute adaptation of a section of the play "R.U.R.".
Split into simpler sentences: The first known piece of television science fiction anywhere in the world was produced by the BBC on February 11,1938. The piece was a thirty-five-minute adaptation of a section of the play "R.U.R.".