In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Example Input: Passage: Anne Beloff was born in 1921 in Hampstead to Simon Beloff and Marie Katzin. Her parents were of Russian–Jewish background, and her siblings included the historian Max Beloff, Baron Beloff, the psychologist John Beloff, the journalist Nora Beloff, and the politician Renee Soskin. She earned a degree in chemistry from University College London in 1942 before completing a PhD in the biochemistry of skin burns with Rudolph Peters at the University of Oxford. She visited Harvard Medical School in 1946 to perform research and returned to the UK in 1948. In the same year she married Ernst Boris Chain, a biochemist who had won the Nobel Prize in Physiology or Medicine in 1945, and moved with him to Rome.
 Link Information: Sir Rudolph Albert Peters MC MID FRS HFRSE FRCP LLD (13 April 1889 – 29 January 1982) Question: How old was the the person with whom Beloff completed a PHD  when he died?
Example Output: Answer: 93

Example Input: Passage: Born on 25 June 1884 in South Kensington, England, the eldest child of Henry Neville Custance and Alice Georgina, née Custance. His grandfather was Admiral Sir Reginald Custance. He joined the Royal Navy on 15 January 1899 as a cadet. He was rated midshipman on 15 May 1900 and served aboard HMS Ocean. Promoted to sub-lieutenant on 15 July 1903 he served aboard HMS Foam in the Mediterranean Station between 1904–1905. He served upon HMS Venerable in 1905 and promoted to lieutenant on 15 January 1905. He was the Gunnery Officer aboard HMS Vanguard between 1913–1917, and was having dinner aboard another ship at Scapa Flow in 1917 when HMS Vanguard suffered an internal explosion and sank with the loss of lives of 843 men. He served aboard HMS Vanguard during World War I and was present during the battle of Jutland in 1916.
 Link Information: His grandfather was Admiral Question: What is the age difference between Wilfred and his grandfather?
Example Output: Answer: 37

Example Input: Passage: Darius was the son of Hystaspes and the grandson of Arsames. Both men belonged to the Achaemenid tribe and were still alive when Darius ascended the throne. Darius justifies his ascension to the throne with his lineage. He claimed he could trace his ancestors back to Achaemenes, even though he was only distantly related. With this in mind, Darius married Atossa, daughter of Cyrus, with whom he had four sons: Xerxes, Achaemenes, Masistes and Hystaspes. He also married Artystone, another daughter of Cyrus, with whom he had two sons, Arsames and Gobryas. Darius married Parmys, the daughter of Bardiya, with whom he had a son, Ariomardus. Furthermore, Darius married Phratagune, with whom he had two sons, Abrokomas and Hyperantes. He also married another woman of the nobility, Phaidyme, the daughter of Otanes. It is unknown if he had any children with her. Before these royal marriages, Darius had married an unknown daughter of his good friend and lance carrier Gobryas from an early marriage, with whom he had three sons, Artobazanes, Ariabignes and Arsamenes. Any daughters he had with her are not known. Although Artobazanes was Darius's first-born, Xerxes became heir and the next king through the influence of Atossa; she had great authority in the kingdom as Darius loved her the most of all his wives.
 Link Information: Arsames ( Aršāma, modern Persian:،آرسام، آرشام‎ Arshām, Greek: ; – ca. 520 BC Question: When was Arsames born?
Example Output:
Answer: 520 BC