Complex sentence: Procter & Gamble, whose factory now dominate the church's skyline, offered to take responsibility for church and its yard in 1987 as the company celebrated its 150 anniversary and three years later, 50 years after the factory opened, the church restoration was complete.
Split into simpler sentences: Procter & Gamble, whose factory now dominates the church's skyline, offered to take responsibility for the church and its yard in 1987 as the company celebrated its 150th anniversary. Three years later, 50 years after the factory opened, the church's restoration was complete.