Complex sentence: Walker's donation to Brock University comes at a time were the value of the arts has been diminishing, however the donation brings hope to the revitalization of the arts, especially in the Niagara Region and St. Catharines.
Split into simpler sentences: Walker's donation to Brock University comes at a time when the value of arts has been diminishing. However, the donation brings hope to the revitalization of the arts, especially in the Niagara Region and St. Catharines.