Complex sentence: In 1933 one locomotive was sent to North America on a tour, 6152 swapping identities with 6100 "The Royal Scot", the identities never being swapped back after its return.
Split into simpler sentences: In 1933 one locomotive was sent to North America on a tour, 6152 swapping identities with 6100 "The Royal Scot". The identities never being swapped back after its return.