Complex sentence: Bleaker Island has been a sheep farm for over a hundred years, and was owned by Arthur Cobb in the early 20th century who wrote a book on the subject, containing forty six of his own black and white photographs.
Split into simpler sentences: Bleaker Island has been a sheep farm for over a hundred years. The island was managed by Arthur Cobb in the early 20th century who wrote a book on the subject, containing forty six of his own black and white photographs.