Complex sentence: Most piobaireachd are traditional tunes that were written perhaps prior to 1745 and in many cases the composer is unknown, however piobaireachd continues to be written by composers up to the present day.
Split into simpler sentences: Most piobaireachd are traditional tunes that were written prior to 1745, and in many cases the composer is unknown. However piobaireachd continues to be written by composers up to the present day.