Complex sentence: In 1938 and in 1941, Waite Phillips donated 127,000 acres of his UU Ranch to the Boy Scouts of America complete with water, mineral and timber rights and, as an endowment, the 23-story Philtower Building in Tulsa.
Split into simpler sentences: In 1938 and in 1941, Phillips donated 127,000 acres of his UU Ranch to the Boy Scouts of America, complete with water, mineral and timber rights. As an endowment, he donated the 23-story Philtower Building in Tulsa.