TASK DEFINITION: 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'.
PROBLEM: 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.
 Question: How many species of pigeons are there?

SOLUTION: Answer: 310

PROBLEM: Passage: The Very Best of TLC: Crazy Sexy Hits material is taken from four of their studio albums: Ooooooohhh... On the TLC Tip (1992), CrazySexyCool (1994), FanMail (1999), and 3D (2002), and Now & Forever: The Hits (2003), which were all recorded from 1991 to 2003. Their 1993 cover of The Time's "Get It Up" for the soundtrack to Poetic Justice does not appear on any of their studio albums, but still appears on the compilation along with the trio's most successful singles in the United Kingdom. These include "No Scrubs", which placed at number three on the UK Singles Chart and was awarded a platinum certification from the British Phonographic Industry (BPI); "Waterfalls", which peaked at number four on the UK Singles Chart and also achieved platinum status; "Unpretty", a silver-certificated single which peaked at number six on the UK Singles Chart, and "Creep", which also peaked at number six on the UK Singles Chart after being reissued across the UK and Europe. It did not, however, include "Dear Lie", a moderately received UK single which was certified silver. Instead, the non-charting songs "Come Get Some", "Damaged" and "Get It Up" were included in the final track listing, with "Whoop De Woo" (a non-album track) and "In Your Arms Tonight" (from 3D) the only two non-single tracks that appeared the compilation.
 Link Information: 

"No Scrubs" met with international success. It became TLC's third number-one single and eighth top 10 single on the Billboard Hot 100. It also earned them their second Grammy Award nomination for Record of the Year. "No Scrubs" is one of TLC's signature songs and was the second-biggest Hot 100 single of 1999 in the U.S Question: Which TLC hit that reached top 10 on the UK Singles Chart was the most successful commercially?

SOLUTION: Answer: "No Scrubs"

PROBLEM: Passage: The Bagration family's genealogy traces back at least to the medieval era in its male line and hundreds of years further back as rulers in the female line. Leonida's grandfather, Prince Alexander Bagration of Mukhrani, was born in 1853 in Georgia's historical capital Tbilisi, then part of the Russian Empire, and was killed by Bolsheviks at Pyatigorsk in 1918 during the Russian revolution. Fearing for their lives, the family took refuge in Constantinople, then spent eight months in Germany before returning to Tbilisi, now capital of the Georgian Soviet Socialist Republic, to re-claim a portion of property which, as émigrés they risked losing to total confiscation. Although the family made repairs to their home and Leonida would recall her grandfather's insistence that they continue to dine formally on silver plate to retain their sense of propriety, they were eventually deprived of all but two rooms of their old palace and subjected to harassment. Thanks to the intervention of Maxim Gorky, who had enjoyed the patronage of the Bagrations, in 1931 they once again fled the Soviet Union, going into exile in Spain. The family moved to France, where Leonida's grandmother and relations had already settled.
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In spite of repeated incidents of dynastic strife, the kingdom continued to prosper during the reigns of Demetrios I (1125–1156), George III (1156–1184), and especially, his daughter Tamar the Great (1184–1213).  Question: How many rulers did the Bagration's have in total?

SOLUTION:
Answer: 6