Complex sentence: A part of Rancho Santa Fe's history is Fairbanks Ranch, originally known as "Rancho Zorro", owned by actor Douglas Fairbanks and his wife, actress Mary Pickford.
Split into simpler sentences: A part of Rancho Santa Fe's history is Fairbanks Ranch, known in the olden days as "Rancho Zorro". Originally Rancho Zorro was owned by actor Douglas Fairbanks and his wife, actress Mary Pickford.