Complex sentence: On the Children's TV series Thomas the Tank Engine and Friends the big station on Sodor is called Knapford not Tidmouth but Tidmouth is used for the name of the engine sheds where most of the characters in the series live.
Split into simpler sentences: On the Children's TV series Thomas the Tank Engine and Friends, the big station on Sodor is called Knapford, not Tidmouth. But Tidmouth is used for the name of the engine sheds where most of the characters in the series live.