Complex sentence: Their repertoire spans virtuosic music literature for flute and concert guitar and ranges from Bach's flute sonatas over Bizet's Carmen Fantasie to Piazzola's "Histoire du Tango".
Split into simpler sentences: Their repertoire spans the realm of music literature for flute and concert guitar. It ranges from Bach's flute sonatas to Bizet's "Carmen Fantasie" to Piazzola's "Histoire du Tango".