Complex sentence: In 1909, Mrs. Thomasina Tittlemouse debuted in "The Tale of the Flopsy Bunnies" where she rescued the six Flopsy Bunnies from Mr. McGregor.
Split into simpler sentences: In 1909, Mrs. Thomasina Tittlemouse debuted in "The Tale of the Flopsy Bunnies". There, she rescued the six Flopsy Bunnies from Mr. McGregor.