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.
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Question: 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

Answer: How many species of pigeons are there?


Question: Passage: From 1805 onwards, Ruty took part to the campaigns of the Grande Armée during the War of the Third Coalition and War of the Fourth Coalition, serving as artillery park director for the Army Corps of Marshal Michel Ney, then Marshal Joachim Murat. A brigadier general from 1807, he served with distinction at the battle of Friedland. In 1808 he was created a baron of the Empire, serving as commander of the artillery school in Toulouse, before being sent to serve in Spain, towards the end of that year. He contributed significantly to the successful sieges of Ciudad Rodrigo and Almeida, before taking command of Marshal Jean-de-Dieu Soult's artillery in the armies of the South and of Andalusia. During this campaign he invented a type of howitzer that bears his name. In 1813, Ruty was recalled to France, and promoted to general of division, before being named commander of Marshal Nicolas Oudinot's Corps artillery during the Saxon campaign of the War of the Sixth Coalition. In November 1813, Ruty was created a count of the Empire. After Napoleon's abdication in 1814, Ruty served the Bourbon Restoration, but during the Hundred Days he joined the Emperor, who named him commander of the artillery of the Army of the North, with Ruty playing a significant role at the battle of Waterloo. General count de Ruty finished his military career as general inspector for artillery during the Second Restoration, subsequently serving as general director for gunpowders and saltpeter (1817), state counsellor (1818) and Peer of France from 1819.
 Link Information: the Emperor, who named him commander of the artillery of the Army of the North, with Ruty playing a significant role at the battle of Waterloo. Answer: France

Answer: What country did Ruty fight in as commander of the artillery of the Army of the North?


Question: Passage: Born in Salem, New Jersey, he attended private schools, and the Rensselaer Polytechnic Institute, before graduating from Union College, New York, in 1855. While at Union he became a member of Theta Delta Chi. After his collegiate career, he studied law, and was admitted to the bar in 1858, commencing the practice of law in Salem. During the Civil War Sinnickson served as Captain in the Union Army. He was elected as a Republican to the Forty-fourth and Forty-fifth United States Congresses, serving in office from March 4, 1875 to March 3, 1879. After his stint in Washington, he resumed the practice of law in Salem. He also served as a delegate to the 1880 Republican National Convention, and he was appointed judge of the Court of Common Pleas in 1896 and reappointed in 1901 and 1906.
 Link Information: March 4, 1877: Rutherford B. Hayes became President of the United States Answer: Ulysses S. Grant

Answer:
Who was the president of the United States when Sinnickson served in Congress?