Complex sentence: Ives is particularly noted for his work on the life of Anne Boleyn, the second wife and queen of King Henry VIII of England, whom he began researching about 1979, eventually publishing an acclaimed biography of her in 1986.
Split into simpler sentences: Ives is particularly noted for his work on the life of Anne Boleyn, the second wife and queen of King Henry VIII of England. He began researching Boleyn about 1979, eventually publishing an acclaimed biography of her in 1986.