You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

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.
is the game of thrones book series over?

A timing belt, timing chain or cambelt is a part of an internal combustion engine that synchronizes the rotation of the crankshaft and the camshaft(s) so that the engine's valves open and close at the proper times during each cylinder's intake and exhaust strokes. In an interference engine the timing belt or chain is also critical to preventing the piston from striking the valves. A timing belt is usually a toothed belt -- a drive belt with teeth on the inside surface. A timing chain is a roller chain.
is the cambelt the same as the timing belt?

Natural gas is often informally referred to simply as ``gas'', especially when compared to other energy sources such as oil or coal. However, it is not to be confused with gasoline, especially in North America, where the term gasoline is often shortened in colloquial usage to gas.

is oil and natural gas the same thing?