Task: Question Generation
Input (English): A Song of Ice and Fire is a series of epic fantasy novels by the American novelist and screenwriter George R.R. Martin. He began the first volume of the series, A Game of Thrones, in 1991, and it was published in 1996. Martin, who initially envisioned the series as a trilogy, has published five out of a planned seven volumes. The fifth and most recent volume of the series published in 2011, A Dance with Dragons, took Martin six years to write. He is still writing the sixth novel, The Winds of Winter.
Output (English): are all the game of thrones books written?