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.

Input: Consider Input: Passage: The spotted green pigeon or Liverpool pigeon (Caloenas maculata) is a species of pigeon which is most likely extinct. It was first mentioned and described in 1783 by John Latham, who had seen two specimens of unknown provenance and a drawing depicting the bird. The taxonomic relationships of the bird were long obscure, and early writers suggested many different possibilities, though the idea that it was related to the Nicobar pigeon (C. nicobarica) prevailed, and it was therefore placed in the same genus, Caloenas. Today, the species is only known from a specimen kept in World Museum, Liverpool. Overlooked for much of the 20th century, it was recognised as a valid extinct species by the IUCN Red List only in 2008. In 2014 a genetic study confirmed it as a distinct species related to the Nicobar pigeon, and showed that the two were the closest relatives of the extinct dodo and Rodrigues solitaire.
 Link Information: The animal order Columbiformes is also constituted of pigeons and doves, and includes about 42 genera and 310 species.
 Answer: 310

Output: How many species of pigeons are there?


Input: Consider Input: Passage: Born in Newport, Rhode Island, Derow obtained his secondary education at The Roxbury Latin School in West Roxbury, Massachusetts. After an A.B. degree at Amherst (with Peter K. Marshall), he read for Greats as a second B.A. degree at Oxford in 1965–1967, achieving a First. At Oxford he was taught by, among others, W. G. (George) Forrest, who was a lasting influence. He completed a Ph.D. at Princeton on 'Rome and the Greek world from the earliest contacts to the end of the first Illyrian war', for which Professor J. V. A. Fine was his Advisor; in the preface to that work, he acknowledges the additional inspiration he had drawn from T. J. Luce and the historian and epigrapher C. Bradford Welles. After a spell of teaching at the University of Toronto, he returned to succeed Forrest at Wadham in 1977 when the latter was elected to the Wykeham Professorship of Ancient History at New College. In 2002–2005 Derow was also Director of Graduate Studies in ancient history for the Oxford Faculty of Classics.
 Link Information: William George Grieve Forrest (24 September 1925 – 14 October 1997) Answer: 42

Output: How old was Derow's teacher and lasting influence at Oxford when Derow graduated from Oxford?


Input: Consider Input: Passage: Born in 1954, Brammer was educated at the Alpha Boys School. After initially working under the name Prince Glen, he began working under the stage name Trinity, taken from the spaghetti western character. After working as a deejay on several Kingston sound systems, he made his debut recording in March 1976 with "Set Up Yourself" for producer Joseph Hoo Kim. "Words of The Prophet" followed for Yabby You, who also produced his debut album, Shanty Town Determination. Late in 1976, he joined up with Dillinger for the "Crank Face" single, and the Clash album, produced by UK-based producer Clement Bushay. 1977 saw the deejay in great demand, recording more than 20 singles for a variety of producers, including Winston Riley, Tommy Cowan, Joe Gibbs, and Yabby You, his biggest hit coming with "Three Piece Suit" for Gibbs, featuring Trinity toasting over a new version of Alton Ellis's "I'm Still In Love With You" rhythm, with a lyric that anticipated the move from 'cultural' lyrics to more material/carnal concerns of the dancehall era. This prompted an answer record from Althea & Donna using the same rhythm, in the form of the UK-chart topping "Uptown Top Ranking". Trinity recorded "Slim Thing" in response, but failed to match Althea & Donna's success. 1977 also saw the release of the Uptown Girl album, produced by Bunny Lee, and strong albums in 1978 in the form of Three Piece Chicken and Chips (with Ranking Trevor) and Showcase. In 1978, Trinity also performed at the One Love Peace Concert in Kingston. In the later 1970s, Trinity began producing both himself and other artists, starting his own Flag Man label. In 1979, he recorded the duet "Funny Feeling" with Dennis Brown, and joined up with Barrington Levy for "Lose Respect" and "I Need a Girl" in 1979 and 1980 respectively. Subsequent albums met with diminishing commercial success, and Trinity switched from deejaying to singing, releasing the albums Telephone Line and Hold Your Corner in 1987 under the name Junior Brammer.
 Link Information:  In 1972, impressed by the rootsy style of producer Bunny Lee, Joseph decided to set up the Channel One Studios Answer: 4


Output: How long had Joseph Hoo Kim been a producer when he collaborated with Trinity?