Complex sentence: The park named for Brown includes a log building originally constructed in 1864 at Fort Wadsworth in what is now South Dakota and later moved to Browns Valley by town founder Joseph R. Brown for use as a residence and place of business for himself and his son Sam.
Split into simpler sentences: The park named for Brown includes a log building originally constructed in 1864 at Fort Wadsworth in what is now South Dakota and later moved to Browns Valley by town founder Joseph R. Brown, the father of Sam. He used the building as a residence and place of business for himself and his son Sam.