Sentence:  A biting , pithy parable of the all pervading hollowness of modern life , the piece has been set by Mlle Lagoon to a sumptuous score ( a single motif played over and over by four thousand <WSD>French</WSD> horns ) by existentialist hot-shot Jean-Paul Sartre . 
Meaning of the word marked with <WSD> tags:  a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves