Complex sentence: He relocated with the Flandrau family to South Dakota and, according to family legend, was tutored in mathematics by Theodore Roosevelt when the future U.S. president stayed at the Flandrau home in 1886.
Split into simpler sentences: He relocated with the Flandrau family to South Dakota. Family legend claims Loving was tutored in mathematics by Theodore Roosevelt when the future U.S. president stayed at the Flandrau home in 1886.