Complex sentence: The PFA Scotland Manager of the Year is awarded by the Professional Footballers Association Scotland to the football manager in Scottish football, whom is seen to have been the best manager over the previous season.
Split into simpler sentences: The PFA Scotland Manager of the Year is awarded by PFA Scotland (Professional Footballers Association Scotland). The award is given to the football manager in Professional Scottish football, whom is seen to have been the best manager over that previous season.