Complex sentence: Tweedsmuir Provincial Park in British Columbia, now divided into Tweedsmuir South Provincial Park and Tweedsmuir North Provincial Park and Protected Area, was created in 1938 to commemorate Buchan's 1937 visit to the Rainbow Range and other nearby areas by horseback and floatplane.
Split into simpler sentences: Tweedsmuir Provincial Park in British Columbia is now divided into Tweedsmuir South Provincial Park and Tweedsmuir North Provincial Park and Protected Area. It was created in 1938 to commemorate Buchan's 1937 visit to the Rainbow Range and other nearby areas by horseback and floatplane.