Complex sentence: Gary Daverne, a former clarinettist of the JSO and then currently a musical theatre conductor, was given the task of directing this reunion orchestra of some eighty players, with music chosen from past programmes, on only three rehearsals.
Split into simpler sentences: Gary Daverne, a former clarinettist of the JSO and then a musical theatre conductor, was given the task of directing the reunion orchestra of some eighty players. Music was chosen from past programmes, on only three rehearsals.