 A court in France has ruled that one of the world's most famous pieces of classical music, Maurice Ravel's Bolero, was written by the composer alone. It rejected a claim from the heirs of a Russian stage designer, Alexandre Benoit, that he'd helped compose the work. The ruling means that Bolero stays in the public domain, free of copyright. Emily Kilpatrick, whose biography on Ravel will be released next year, told the BBC that the composer didn't expect it to be the hit it became.