Complex sentence: The Slaight family's 2015 donation of $3 million will result in the creation of the Ada Slaight Education Centre at YPT--the "largest non-capital gift ever received" by a Toronto theatre company.
Split into simpler sentences: The Slaight family's 2015 donation of $3 million will result in the creation of the Ada Slaight Education Centre at YPT. This is the "largest non-capital gift ever received" by a Toronto theatre company.