Complex sentence: Ten days after its first production the piece was prohibited by the Commune, but the public demanded its representation; the mayor of Paris was compelled to appeal to the National Convention, and the piece was played while some 30,000 Parisians guarded the hall.
Split into simpler sentences: Ten days after its first production the piece was prohibited by the Commune, but the public demanded its representation. The mayor of Paris was compelled to appeal to the National Convention, and the piece was played while some 30,000 Parisians guarded the hall.