Question: Who is the The Golden Stairs' painter's son?

full_context: Document 1: The Beguiling of Merlin: The Beguiling of Merlin is a painting by the British Pre-Raphaelite painter Edward Burne-Jones that was created between 1872 and 1877.
Document 2: Godfrey Baring: A member of the influential Baring family, he was the son of Lieutenant-General Charles Baring, son of Henry Bingham Baring, son of Henry Baring, third son of Sir Francis Baring, 1st Baronet. His mother was Helen Graham, daughter of Sir James Graham, 2nd Baronet. He was a lifelong resident of the Isle of Wight. He became involved in politics and public affairs at an early age: he was elected president of the Isle of Wight Liberal Union aged 23, was made a Justice of the Peace a year later and was High Sheriff of Hampshire in 1897 at the age of 26. In 1898 he became chairman of the Isle of Wight County Council, a position he held for the rest of his life.
Document 3: Georgiana Burne-Jones: Georgiana Burne-Jones, Lady Burne-Jones (Birmingham, 21 July 1840 – 2 February 1920), the second oldest of the Macdonald sisters, was the wife of Pre-Raphaelite Brotherhood artist Edward Burne-Jones, mother of painter Philip Burne-Jones, aunt of novelist Rudyard Kipling, confidante and friend of George Eliot, William Morris, and John Ruskin something of a painter and engraver in her own right. She was a Trustee of the South London Gallery and was elected to the parish Council of Rottingdean, near Brighton in Sussex.
Document 4: The Last Sleep of Arthur in Avalon: The Last Sleep of Arthur in Avalon is a painting by Edward Burne-Jones, started in 1881. The massive painting measures 279 cm × 650 cm, and is widely considered to be Burne-Jones's "magnum opus".
Document 5: Stairs 1 Geneva: Stairs 1 Geneva is a film by Peter Greenaway. It is also a large-scale art installation, an exhibition, a catalogue and a CD album.
Document 6: Isabella Bird: Isabella Lucy Bird, married name Bishop (15 October 1831 – 7 October 1904), was a nineteenth-century British explorer, writer, photographer, and naturalist. With Fanny Jane Butler she founded the John Bishop Memorial hospital in Srinagar. She was the first woman to be elected Fellow of the Royal Geographical Society.
Document 7: Hope (Burne-Jones): Hope is a late oil painting by the Pre-Raphaelite artist Edward Burne-Jones. It was painted on commission for Mrs. George Marston Whitin of Whitinsville, Massachusetts in 1896.
Document 8: The Merciful Knight: The Merciful Knight is a watercolour by the pre-Raphaelite artist Edward Burne-Jones which was completed in 1863 and is currently housed at the Birmingham Museum & Art Gallery.
Document 9: Pygmalion and the Image series: Pygmalion and the Image is the second series of four oil paintings in the Pygmalion and Galatea series by the Pre-Raphaelite artist Edward Burne-Jones which was completed between 1875 and 1878. The two collections may be seen below, in the Gallery, the first being now owned by Lord Lloyd Webber, and the second housed at the Birmingham Museum & Art Gallery. This article deals with an appraisal of the second series.
Document 10: The Legend of Briar Rose: The Legend of Briar Rose is the title of a series of paintings by the Pre-Raphaelite artist Edward Burne-Jones which were completed between 1885 and 1890. The four original paintings – The Briar Wood, The Council Chamber, The Garden Court and The Rose Bower – and an additional ten adjoining panels, are located at Buscot Park in Oxfordshire, England.
Document 11: Daphne du Maurier: Daphne du Maurier was born in London, the middle of three daughters of prominent actor-manager Sir Gerald du Maurier and actress Muriel Beaumont. Her mother was a maternal niece of journalist, author, and lecturer William Comyns Beaumont. Her grandfather was author and "Punch" cartoonist George du Maurier, who created the character of Svengali in the novel "Trilby". Her elder sister, Angela du Maurier, also became a writer, and her younger sister Jeanne was a painter.
Document 12: At Binsey, near Oxford: At Binsey, near Oxford is a watercolour painting by the English Victorian artist George Price Boyce, who was associated with the Pre-Raphaelite art movement.
Document 13: Bermuda: Bermuda watercolours painted by local artists are sold at various galleries. Hand-carved cedar sculptures are another speciality. One such 7 ft (2.1 m) sculpture, created by Bermudian sculptor Chesley Trott, is installed at the airport's baggage claim area. In 2010, his sculpture The Arrival was unveiled near the bay to commemorate the freeing of slaves from the American brig Enterprise in 1835. Local artwork may also be viewed at several galleries around the island. Alfred Birdsey was one of the more famous and talented watercolourists; his impressionistic landscapes of Hamilton, St George's and the surrounding sailboats, homes, and bays of Bermuda are world-renowned.
Document 14: The Golden Stairs: The Golden Stairs is one of the best-known paintings by the Pre-Raphaelite artist Edward Burne-Jones. It was begun in 1876 and exhibited at the Grosvenor Gallery in 1880.
Document 15: India Jane Birley: Born in London, she is the daughter of Lady Annabel Vane-Tempest-Stewart, from her marriage to nightclub mogul Mark Birley. She has two brothers, Rupert (presumed deceased) and Robin; and three half-siblings, Zac, Jemima, and Ben Goldsmith from her mother's affair with James Goldsmith, the man who would become her second husband.
ground_truth: Philip Burne-Jones
sub_queries: Who is The Golden Stairs by? Answer: Edward Burne-Jones
Edward Burne-Jones >> child Answer: Philip Burne-Jones