Complex sentence: The foundation has not announced that it has received any annual gifts or commitments such that it can meet this pledge and its annual golf event has not raised more than $1.5 million net of expenses for St Jude's in any previous year.
Split into simpler sentences: The foundation has not announced that it has received any annual gifts or commitments such that it can meet this pledge. Its annual golf event has not raised more than $1.5 million net of expenses for St Jude's in any previous year.