Complex sentence: Their search attracts the attention of a spiv named Swinburne (Bruce Forsyth), who works for a man known as the Bookman (Sam Jaffe) who has the other half of the book.
Split into simpler sentences: Their search attracts the attention of a spiv named Swinburne (Bruce Forsyth). Swinburne works for a man known as the Bookman (Sam Jaffe), who has the other half of the book.