Complex sentence: It was founded in 1964 by famed television bandleader Lawrence Welk with his purchase of of undeveloped land near Escondido, California, 20 miles north of San Diego.
Split into simpler sentences: It was founded in 1964 by famed television bandleader Lawrence Welk. In 1964, Lawrence Welk purchased of undeveloped land near Escondido, California, 20 miles north of San Diego.