Complex sentence: In December 2005, philanthropist John Buhler donated $5 million to the Western school division for the purpose of building a large performing arts centre, and was to be the largest ever private gift to a Canadian public school.
Split into simpler sentences: In December 2005, philanthropist John Buhler donated five million to the Western school division for the purpose of building a large performing arts centre. This was to be the largest ever private gift to a Canadian public school.