In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: The Best Science Fiction of the Year was a series of annual paperback anthologies edited by Terry Carr. It was published by Ballantine Books from 1972 to 1980, Pocket Books from 1981 to 1983, Baen Books in 1984, and Tor Books from 1985 to 1987. The Tor Books volumes bore the title Terry Carr's Best Science Fiction of the Year from 1985 to 1986, and Terry Carr's Best Science Fiction and Fantasy of the Year in 1987. Most volumes were also issued in hardcover in the United Kingdom by Gollancz, the last three under the variant title Best SF of the Year. The series was a continuation of the earlier anthology series World's Best Science Fiction, edited by Carr with Donald A. Wollheim, published from 1965 to 1971 by Ace Books. (Wollheim, with co-editor Arthur W. Saha, also issued his own separate continuation, The Annual World’s Best SF, from 1972 to 1990.)
 Link Information: Ballantine Books is a major book publisher located in the United States, founded in 1952 by Ian Ballantine with his wife, Betty Ballantine. Answer: 20
How many years had Ballantine Books been in business before it started published the series of annual paperback anthologies?

Passage: Thomas was born to Thomas Marston Green Sr., a future Colonel in the Continental Army, and Martha Wills. He was born in Williamsburg, Virginia, on February 26, 1758. In 1782 he moved with his family to Natchez District, Mississippi Territory. He would later move to Fayette, Mississippi where he would build the Springfield Plantation, and where he would live until his death. The Green family were good friends with Andrew Jackson and Rachel Donelson. Thomas's brother Abraham married Elizabeth Caffery who was the niece of Rachel Jackson. In August 1791, Andrew Jackson and Rachel were married at the Green Family Springfield Plantation. The marriage ceremony was performed by Thomas Green Sr., while Thomas Jr. served as a witness. Andrew and Rachel would later find out that Rachel's divorce was not finalized, at the time of the wedding.
 Link Information: Thomas Marston Green Sr. (November 19, 1723 – 1805) Answer: 46
How old was Thomas Marston Green Jr.s father when he was born?

Passage: Lewis was born in Bermuda, the youngest of the three children – all boys – of Major Leonard Carey Lewis (1880–1952) and his wife, Katherine Barbara, née Sutton (1884–1965). There was a military tradition on both sides of the family, which the young Lewis did not follow: his musical talent became clear from his early years and he was sent to Salisbury Cathedral choir school, and at the age of eight he became a chorister at St George's Chapel, Windsor. At the age of 13 Lewis attended the Royal Academy of Music (RAM), London, studying composition with William Alwyn. He won a scholarship to Wellington College, from where, in 1932, he went to Peterhouse, Cambridge. There, according to The Times, he was "one of the most brilliant of his generation to have come under the influence of E.J.Dent". A scholarship enabled him to spend some months studying in Paris with Nadia Boulanger in 1934. He graduated the following year as BA and MusB.
 Link Information: Although usually referred to in the singular, the territory consists of 181 islands Answer: 181 

How many islands comprise the nation that Lewis was born in?