Complex sentence: Since 1978, the city has hosted an annual Duckling Day parade each spring, in which children dressed as ducklings and their parents retrace the path taken by Mrs. Mallard and her ducklings to get from the Charles River to the Public Garden.
Split into simpler sentences: Since 1978, the city has hosted an annual Duckling Day parade each spring, with children dressed as ducklings and their parents. Part of the route retraces the path taken by Mrs. Mallard and her ducklings to get to the Public Garden.